"You are an auditor for XBRL filings. \nGiven two concepts and the provided filing (schema, presentation, calculation, definition, label, instance, and US GAAP taxonomy),\ndetermine which one of the following erroneous relationship types best describes the relationship between the two concepts:\n\n(1) Reversal  \n    Definition: A relationship is flagged as Reversal when the filer\u2019s extension taxonomy redefines element hierarchy inconsistently with the US GAAP taxonomy. Specifically, this occurs when an element that should be a sibling in the US GAAP taxonomy is instead defined as a child of another element (or vice versa, a child element is incorrectly redefined as a sibling).\n\n(2) Inappropriateness  \n    Definition: A relationship is flagged as Inappropriateness when elements appear under an abstract category where they do not belong, contrary to the US GAAP taxonomy.\n\n(3) CombinationErr  \n    Definition: A relationship is flagged as CombinationErr when an axis in the filer\u2019s extension taxonomy is associated with inappropriate members not permitted by the US GAAP taxonomy.\n\nYou must reference the US GAAP taxonomy to retrieve and check the two concepts across the entire filing.\nOutput only one of the following labels exactly, chosen strictly from:\n[\"Reversal\", \"Inappropriateness\", \"CombinationErr\"].\n\nNo explanations. No extra text. Only the label.\n\n    \n##Schema document\nNone\n\n##Presentation linkbase document\n<?xml version='1.0' encoding='US-ASCII'?>\n<link:linkbase xmlns:link=\"http://www.xbrl.org/2003/linkbase\" xmlns:xlink=\"http://www.w3.org/1999/xlink\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:schemaLocation=\"http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd\"><link:roleRef roleURI=\"http://www.bxp.com/role/NoncontrollingInterestsPropertyPartnershipsNarrativeDetails\" xlink:type=\"simple\" xlink:href=\"bxp-20231231.xsd#NoncontrollingInterestsPropertyPartnershipsNarrativeDetails\"/>\n  <link:presentationLink xlink:role=\"http://www.bxp.com/role/NoncontrollingInterestsPropertyPartnershipsNarrativeDetails\" xlink:type=\"extended\">\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_NoncontrollingInterestAbstract_bc5517a1-14e9-43f9-9f1a-9ecc96f5c17b\" 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  <link:presentationArc order=\"1\" xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/parent-child\" xlink:from=\"loc_us-gaap_MinorityInterestTable_2821609c-0459-4a8e-96d2-e6691faefe8a\" xlink:to=\"loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_3ba4d706-1ca8-41c3-8a97-85802ac4adb3\" xlink:type=\"arc\" preferredLabel=\"http://www.xbrl.org/2003/role/terseLabel\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_0c414f8e-dc3c-42f0-917b-716c2c2e966c\" xlink:href=\"https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain\"/>\n    <link:presentationArc order=\"1\" xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/parent-child\" xlink:from=\"loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_3ba4d706-1ca8-41c3-8a97-85802ac4adb3\" 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xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/parent-child\" xlink:from=\"loc_us-gaap_StatementEquityComponentsAxis_be0133c6-9fb9-4acb-ab8d-e536f92a78e5\" xlink:to=\"loc_us-gaap_EquityComponentDomain_9f338809-1e8a-484a-ba28-8b4384ea8cf9\" xlink:type=\"arc\" preferredLabel=\"http://www.xbrl.org/2003/role/terseLabel\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_NoncontrollingInterestMember_f4f45cf2-5677-41b9-9de9-30a869e9b375\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NoncontrollingInterestMember\"/>\n    <link:presentationArc order=\"1\" xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/parent-child\" xlink:from=\"loc_us-gaap_EquityComponentDomain_9f338809-1e8a-484a-ba28-8b4384ea8cf9\" xlink:to=\"loc_us-gaap_NoncontrollingInterestMember_f4f45cf2-5677-41b9-9de9-30a869e9b375\" xlink:type=\"arc\" preferredLabel=\"http://www.xbrl.org/2003/role/terseLabel\"/>\n    <link:loc xlink:type=\"locator\" 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preferredLabel=\"http://www.xbrl.org/2003/role/terseLabel\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_srt_OwnershipDomain_2e96f9a5-3ed2-42e0-b5a9-0cc2f293f7b7\" xlink:href=\"https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_OwnershipDomain\"/>\n    <link:presentationArc order=\"1\" xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/parent-child\" xlink:from=\"loc_srt_OwnershipAxis_0fe99e14-bce2-4bf5-b668-9af2004ffc34\" xlink:to=\"loc_srt_OwnershipDomain_2e96f9a5-3ed2-42e0-b5a9-0cc2f293f7b7\" xlink:type=\"arc\" preferredLabel=\"http://www.xbrl.org/2003/role/terseLabel\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_bxp_ThreeFourThreeMadisonAvenueMember_756f4f72-c151-4647-a117-13ec23284ee9\" xlink:href=\"bxp-20231231.xsd#bxp_ThreeFourThreeMadisonAvenueMember\"/>\n    <link:presentationArc order=\"1\" xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/parent-child\" xlink:from=\"loc_srt_OwnershipDomain_2e96f9a5-3ed2-42e0-b5a9-0cc2f293f7b7\" xlink:to=\"loc_bxp_ThreeFourThreeMadisonAvenueMember_756f4f72-c151-4647-a117-13ec23284ee9\" xlink:type=\"arc\" preferredLabel=\"http://www.xbrl.org/2003/role/terseLabel\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_NoncontrollingInterestMember_e5d51c2a-e1ec-4ed9-bf2b-d0ca9e886563\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NoncontrollingInterestMember\"/>\n    <link:presentationArc order=\"2\" xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/parent-child\" xlink:from=\"loc_srt_OwnershipDomain_2e96f9a5-3ed2-42e0-b5a9-0cc2f293f7b7\" xlink:to=\"loc_us-gaap_NoncontrollingInterestMember_e5d51c2a-e1ec-4ed9-bf2b-d0ca9e886563\" xlink:type=\"arc\" preferredLabel=\"http://www.xbrl.org/2003/role/terseLabel\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_a1a98189-39e0-4131-8a99-eb57802063d7\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis\"/>\n    <link:presentationArc order=\"4\" xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/parent-child\" xlink:from=\"loc_us-gaap_MinorityInterestTable_2821609c-0459-4a8e-96d2-e6691faefe8a\" xlink:to=\"loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_a1a98189-39e0-4131-8a99-eb57802063d7\" xlink:type=\"arc\" preferredLabel=\"http://www.xbrl.org/2003/role/terseLabel\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_a5a482db-81f0-42dd-9ed0-78951b7fab6d\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain\"/>\n    <link:presentationArc order=\"1\" xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/parent-child\" xlink:from=\"loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_a1a98189-39e0-4131-8a99-eb57802063d7\" xlink:to=\"loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_a5a482db-81f0-42dd-9ed0-78951b7fab6d\" xlink:type=\"arc\" preferredLabel=\"http://www.xbrl.org/2003/role/terseLabel\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_ConstructionInProgressMember_5cc2f84c-b4ab-4bd7-aea9-5cf30d46e8dd\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ConstructionInProgressMember\"/>\n    <link:presentationArc order=\"1\" xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/parent-child\" xlink:from=\"loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_a5a482db-81f0-42dd-9ed0-78951b7fab6d\" xlink:to=\"loc_us-gaap_ConstructionInProgressMember_5cc2f84c-b4ab-4bd7-aea9-5cf30d46e8dd\" xlink:type=\"arc\" preferredLabel=\"http://www.xbrl.org/2003/role/terseLabel\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_MinorityInterestLineItems_37f39cc8-586e-4097-a088-f5411371a916\" 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xlink:to=\"loc_us-gaap_MinorityInterestInLimitedPartnerships_3733a34a-3b57-4508-b51e-c1be6cc2a317\" xlink:type=\"arc\" preferredLabel=\"http://www.xbrl.org/2003/role/terseLabel\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners_3322ddc1-267f-42eb-9940-94a4b8a56d3c\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners\"/>\n    <link:presentationArc order=\"2\" xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/parent-child\" xlink:from=\"loc_us-gaap_MinorityInterestLineItems_37f39cc8-586e-4097-a088-f5411371a916\" xlink:to=\"loc_us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners_3322ddc1-267f-42eb-9940-94a4b8a56d3c\" xlink:type=\"arc\" preferredLabel=\"http://www.xbrl.org/2003/role/terseLabel\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_PaymentsToAcquireInvestments_b48cccee-1297-4a2d-9398-9122bb7cc37c\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsToAcquireInvestments\"/>\n    <link:presentationArc order=\"3\" xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/parent-child\" xlink:from=\"loc_us-gaap_MinorityInterestLineItems_37f39cc8-586e-4097-a088-f5411371a916\" xlink:to=\"loc_us-gaap_PaymentsToAcquireInvestments_b48cccee-1297-4a2d-9398-9122bb7cc37c\" xlink:type=\"arc\" preferredLabel=\"http://www.xbrl.org/2003/role/terseLabel\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_ContributionOfProperty_c31c4af7-4888-45cb-b69c-d3579cf6ce36\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ContributionOfProperty\"/>\n    <link:presentationArc order=\"4\" xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/parent-child\" xlink:from=\"loc_us-gaap_MinorityInterestLineItems_37f39cc8-586e-4097-a088-f5411371a916\" xlink:to=\"loc_us-gaap_ContributionOfProperty_c31c4af7-4888-45cb-b69c-d3579cf6ce36\" xlink:type=\"arc\" preferredLabel=\"http://www.xbrl.org/2003/role/verboseLabel\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_MinorityInterestOwnershipPercentageByParent_8e320ddb-9037-494e-aab4-57a8efb114d5\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MinorityInterestOwnershipPercentageByParent\"/>\n    <link:presentationArc order=\"5\" xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/parent-child\" xlink:from=\"loc_us-gaap_MinorityInterestLineItems_37f39cc8-586e-4097-a088-f5411371a916\" xlink:to=\"loc_us-gaap_MinorityInterestOwnershipPercentageByParent_8e320ddb-9037-494e-aab4-57a8efb114d5\" xlink:type=\"arc\" preferredLabel=\"http://www.xbrl.org/2003/role/terseLabel\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_NumberOfRealEstateProperties_e8c54e29-8c61-43ad-918d-0e304d1285e7\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NumberOfRealEstateProperties\"/>\n    <link:presentationArc order=\"6\" xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/parent-child\" xlink:from=\"loc_us-gaap_MinorityInterestLineItems_37f39cc8-586e-4097-a088-f5411371a916\" xlink:to=\"loc_us-gaap_NumberOfRealEstateProperties_e8c54e29-8c61-43ad-918d-0e304d1285e7\" xlink:type=\"arc\" preferredLabel=\"http://www.xbrl.org/2003/role/terseLabel\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_ProceedsFromMinorityShareholders_01181d8d-ec78-4e01-a7d2-1fa864401553\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromMinorityShareholders\"/>\n    <link:presentationArc order=\"7\" xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/parent-child\" xlink:from=\"loc_us-gaap_MinorityInterestLineItems_37f39cc8-586e-4097-a088-f5411371a916\" xlink:to=\"loc_us-gaap_ProceedsFromMinorityShareholders_01181d8d-ec78-4e01-a7d2-1fa864401553\" xlink:type=\"arc\" preferredLabel=\"http://www.xbrl.org/2003/role/terseLabel\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest_dbd6d357-834f-4db5-a8f9-1ca95b190736\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest\"/>\n    <link:presentationArc order=\"8\" xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/parent-child\" xlink:from=\"loc_us-gaap_MinorityInterestLineItems_37f39cc8-586e-4097-a088-f5411371a916\" xlink:to=\"loc_us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest_dbd6d357-834f-4db5-a8f9-1ca95b190736\" xlink:type=\"arc\" preferredLabel=\"http://www.xbrl.org/2003/role/terseLabel\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_bxp_CarryingValuePercentOfTotal_1e307e0d-fa97-4386-b5d0-b63f9f710b64\" xlink:href=\"bxp-20231231.xsd#bxp_CarryingValuePercentOfTotal\"/>\n    <link:presentationArc order=\"9\" xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/parent-child\" xlink:from=\"loc_us-gaap_MinorityInterestLineItems_37f39cc8-586e-4097-a088-f5411371a916\" xlink:to=\"loc_bxp_CarryingValuePercentOfTotal_1e307e0d-fa97-4386-b5d0-b63f9f710b64\" xlink:type=\"arc\" preferredLabel=\"http://www.xbrl.org/2003/role/terseLabel\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_bxp_DifferenceBetweenPurchasePriceAndCarryingValue_288ff9ba-df74-4bba-99e9-517794e1e515\" xlink:href=\"bxp-20231231.xsd#bxp_DifferenceBetweenPurchasePriceAndCarryingValue\"/>\n    <link:presentationArc order=\"10\" xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/parent-child\" xlink:from=\"loc_us-gaap_MinorityInterestLineItems_37f39cc8-586e-4097-a088-f5411371a916\" xlink:to=\"loc_bxp_DifferenceBetweenPurchasePriceAndCarryingValue_288ff9ba-df74-4bba-99e9-517794e1e515\" xlink:type=\"arc\" preferredLabel=\"http://www.xbrl.org/2003/role/terseLabel\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_bxp_DifferenceBetweenProceedsFromSaleAndNoncontrollingInterest_c2d67603-d640-4046-ba80-313701021e44\" xlink:href=\"bxp-20231231.xsd#bxp_DifferenceBetweenProceedsFromSaleAndNoncontrollingInterest\"/>\n    <link:presentationArc order=\"11\" xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/parent-child\" xlink:from=\"loc_us-gaap_MinorityInterestLineItems_37f39cc8-586e-4097-a088-f5411371a916\" xlink:to=\"loc_bxp_DifferenceBetweenProceedsFromSaleAndNoncontrollingInterest_c2d67603-d640-4046-ba80-313701021e44\" xlink:type=\"arc\" preferredLabel=\"http://www.xbrl.org/2003/role/terseLabel\"/>\n  </link:presentationLink>\n  </link:linkbase>\n\n\n##Calculation linkbase document\n<?xml version='1.0' encoding='US-ASCII'?>\n<link:linkbase xmlns:link=\"http://www.xbrl.org/2003/linkbase\" xmlns:xlink=\"http://www.w3.org/1999/xlink\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:schemaLocation=\"http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd\"/>\n\n\n##Definition linkbase document\n<?xml version='1.0' encoding='US-ASCII'?>\n<link:linkbase xmlns:link=\"http://www.xbrl.org/2003/linkbase\" xmlns:xlink=\"http://www.w3.org/1999/xlink\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xbrldt=\"http://xbrl.org/2005/xbrldt\" xsi:schemaLocation=\"http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd\"><link:arcroleRef arcroleURI=\"http://xbrl.org/int/dim/arcrole/all\" xlink:type=\"simple\" xlink:href=\"http://www.xbrl.org/2005/xbrldt-2005.xsd#all\"/>\n  <link:arcroleRef arcroleURI=\"http://xbrl.org/int/dim/arcrole/hypercube-dimension\" xlink:type=\"simple\" xlink:href=\"http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension\"/>\n  <link:arcroleRef arcroleURI=\"http://xbrl.org/int/dim/arcrole/dimension-default\" xlink:type=\"simple\" xlink:href=\"http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default\"/>\n  <link:arcroleRef arcroleURI=\"http://xbrl.org/int/dim/arcrole/dimension-domain\" xlink:type=\"simple\" xlink:href=\"http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain\"/>\n  <link:arcroleRef arcroleURI=\"http://xbrl.org/int/dim/arcrole/domain-member\" xlink:type=\"simple\" xlink:href=\"http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member\"/>\n  <link:roleRef roleURI=\"http://www.bxp.com/role/NoncontrollingInterestsPropertyPartnershipsNarrativeDetails\" xlink:type=\"simple\" xlink:href=\"bxp-20231231.xsd#NoncontrollingInterestsPropertyPartnershipsNarrativeDetails\"/>\n  <link:definitionLink xlink:role=\"http://www.bxp.com/role/NoncontrollingInterestsPropertyPartnershipsNarrativeDetails\" xlink:type=\"extended\">\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_MinorityInterestLineItems_37f39cc8-586e-4097-a088-f5411371a916\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MinorityInterestLineItems\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_MinorityInterestTable_2821609c-0459-4a8e-96d2-e6691faefe8a\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MinorityInterestTable\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/all\" xlink:from=\"loc_us-gaap_MinorityInterestLineItems_37f39cc8-586e-4097-a088-f5411371a916\" xlink:to=\"loc_us-gaap_MinorityInterestTable_2821609c-0459-4a8e-96d2-e6691faefe8a\" xlink:type=\"arc\" order=\"1\" xbrldt:closed=\"true\" xbrldt:contextElement=\"segment\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_3ba4d706-1ca8-41c3-8a97-85802ac4adb3\" xlink:href=\"https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/hypercube-dimension\" xlink:from=\"loc_us-gaap_MinorityInterestTable_2821609c-0459-4a8e-96d2-e6691faefe8a\" xlink:to=\"loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_3ba4d706-1ca8-41c3-8a97-85802ac4adb3\" xlink:type=\"arc\" order=\"1\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_3ba4d706-1ca8-41c3-8a97-85802ac4adb3_default\" xlink:href=\"https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/dimension-default\" xlink:from=\"loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_3ba4d706-1ca8-41c3-8a97-85802ac4adb3\" xlink:to=\"loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_3ba4d706-1ca8-41c3-8a97-85802ac4adb3_default\" xlink:type=\"arc\" order=\"1\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_0c414f8e-dc3c-42f0-917b-716c2c2e966c\" xlink:href=\"https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/dimension-domain\" xlink:from=\"loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_3ba4d706-1ca8-41c3-8a97-85802ac4adb3\" xlink:to=\"loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_0c414f8e-dc3c-42f0-917b-716c2c2e966c\" xlink:type=\"arc\" order=\"1\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_bxp_ThreeFourThreeMadisonAvenueMember_cc26a43c-d3df-4c99-92f8-57a3f9554a5d\" xlink:href=\"bxp-20231231.xsd#bxp_ThreeFourThreeMadisonAvenueMember\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/domain-member\" xlink:from=\"loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_0c414f8e-dc3c-42f0-917b-716c2c2e966c\" xlink:to=\"loc_bxp_ThreeFourThreeMadisonAvenueMember_cc26a43c-d3df-4c99-92f8-57a3f9554a5d\" xlink:type=\"arc\" order=\"0\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_bxp_ThreeZeroZeroBinneyAndTwoNineZeroBinneyMember_5651c920-919a-4636-af8a-db23e9096e1c\" xlink:href=\"bxp-20231231.xsd#bxp_ThreeZeroZeroBinneyAndTwoNineZeroBinneyMember\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/domain-member\" xlink:from=\"loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_0c414f8e-dc3c-42f0-917b-716c2c2e966c\" xlink:to=\"loc_bxp_ThreeZeroZeroBinneyAndTwoNineZeroBinneyMember_5651c920-919a-4636-af8a-db23e9096e1c\" xlink:type=\"arc\" order=\"1\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_bxp_ThreeZeroZeroBinneyStreetMember_7466095b-5423-4caf-bb82-f2daac8f7e7f\" xlink:href=\"bxp-20231231.xsd#bxp_ThreeZeroZeroBinneyStreetMember\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/domain-member\" xlink:from=\"loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_0c414f8e-dc3c-42f0-917b-716c2c2e966c\" xlink:to=\"loc_bxp_ThreeZeroZeroBinneyStreetMember_7466095b-5423-4caf-bb82-f2daac8f7e7f\" xlink:type=\"arc\" order=\"2\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_StatementEquityComponentsAxis_be0133c6-9fb9-4acb-ab8d-e536f92a78e5\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementEquityComponentsAxis\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/hypercube-dimension\" xlink:from=\"loc_us-gaap_MinorityInterestTable_2821609c-0459-4a8e-96d2-e6691faefe8a\" xlink:to=\"loc_us-gaap_StatementEquityComponentsAxis_be0133c6-9fb9-4acb-ab8d-e536f92a78e5\" xlink:type=\"arc\" order=\"2\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_EquityComponentDomain_be0133c6-9fb9-4acb-ab8d-e536f92a78e5_default\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityComponentDomain\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/dimension-default\" xlink:from=\"loc_us-gaap_StatementEquityComponentsAxis_be0133c6-9fb9-4acb-ab8d-e536f92a78e5\" xlink:to=\"loc_us-gaap_EquityComponentDomain_be0133c6-9fb9-4acb-ab8d-e536f92a78e5_default\" xlink:type=\"arc\" order=\"1\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_EquityComponentDomain_9f338809-1e8a-484a-ba28-8b4384ea8cf9\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityComponentDomain\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/dimension-domain\" xlink:from=\"loc_us-gaap_StatementEquityComponentsAxis_be0133c6-9fb9-4acb-ab8d-e536f92a78e5\" xlink:to=\"loc_us-gaap_EquityComponentDomain_9f338809-1e8a-484a-ba28-8b4384ea8cf9\" xlink:type=\"arc\" order=\"1\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_NoncontrollingInterestMember_f4f45cf2-5677-41b9-9de9-30a869e9b375\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NoncontrollingInterestMember\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/domain-member\" xlink:from=\"loc_us-gaap_EquityComponentDomain_9f338809-1e8a-484a-ba28-8b4384ea8cf9\" xlink:to=\"loc_us-gaap_NoncontrollingInterestMember_f4f45cf2-5677-41b9-9de9-30a869e9b375\" xlink:type=\"arc\" order=\"0\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_ParentMember_eb281c6f-0f2e-41d3-bb04-c2c448f0fd6c\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ParentMember\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/domain-member\" xlink:from=\"loc_us-gaap_EquityComponentDomain_9f338809-1e8a-484a-ba28-8b4384ea8cf9\" xlink:to=\"loc_us-gaap_ParentMember_eb281c6f-0f2e-41d3-bb04-c2c448f0fd6c\" xlink:type=\"arc\" order=\"1\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_srt_OwnershipAxis_0fe99e14-bce2-4bf5-b668-9af2004ffc34\" xlink:href=\"https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_OwnershipAxis\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/hypercube-dimension\" xlink:from=\"loc_us-gaap_MinorityInterestTable_2821609c-0459-4a8e-96d2-e6691faefe8a\" xlink:to=\"loc_srt_OwnershipAxis_0fe99e14-bce2-4bf5-b668-9af2004ffc34\" xlink:type=\"arc\" order=\"3\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_srt_OwnershipDomain_0fe99e14-bce2-4bf5-b668-9af2004ffc34_default\" xlink:href=\"https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_OwnershipDomain\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/dimension-default\" xlink:from=\"loc_srt_OwnershipAxis_0fe99e14-bce2-4bf5-b668-9af2004ffc34\" xlink:to=\"loc_srt_OwnershipDomain_0fe99e14-bce2-4bf5-b668-9af2004ffc34_default\" xlink:type=\"arc\" order=\"1\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_srt_OwnershipDomain_2e96f9a5-3ed2-42e0-b5a9-0cc2f293f7b7\" xlink:href=\"https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_OwnershipDomain\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/dimension-domain\" xlink:from=\"loc_srt_OwnershipAxis_0fe99e14-bce2-4bf5-b668-9af2004ffc34\" xlink:to=\"loc_srt_OwnershipDomain_2e96f9a5-3ed2-42e0-b5a9-0cc2f293f7b7\" xlink:type=\"arc\" order=\"1\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_bxp_ThreeFourThreeMadisonAvenueMember_756f4f72-c151-4647-a117-13ec23284ee9\" xlink:href=\"bxp-20231231.xsd#bxp_ThreeFourThreeMadisonAvenueMember\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/domain-member\" xlink:from=\"loc_srt_OwnershipDomain_2e96f9a5-3ed2-42e0-b5a9-0cc2f293f7b7\" xlink:to=\"loc_bxp_ThreeFourThreeMadisonAvenueMember_756f4f72-c151-4647-a117-13ec23284ee9\" xlink:type=\"arc\" order=\"0\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_NoncontrollingInterestMember_e5d51c2a-e1ec-4ed9-bf2b-d0ca9e886563\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NoncontrollingInterestMember\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/domain-member\" xlink:from=\"loc_srt_OwnershipDomain_2e96f9a5-3ed2-42e0-b5a9-0cc2f293f7b7\" xlink:to=\"loc_us-gaap_NoncontrollingInterestMember_e5d51c2a-e1ec-4ed9-bf2b-d0ca9e886563\" xlink:type=\"arc\" order=\"1\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_a1a98189-39e0-4131-8a99-eb57802063d7\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/hypercube-dimension\" xlink:from=\"loc_us-gaap_MinorityInterestTable_2821609c-0459-4a8e-96d2-e6691faefe8a\" xlink:to=\"loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_a1a98189-39e0-4131-8a99-eb57802063d7\" xlink:type=\"arc\" order=\"4\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_a1a98189-39e0-4131-8a99-eb57802063d7_default\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/dimension-default\" xlink:from=\"loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_a1a98189-39e0-4131-8a99-eb57802063d7\" xlink:to=\"loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_a1a98189-39e0-4131-8a99-eb57802063d7_default\" xlink:type=\"arc\" order=\"1\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_a5a482db-81f0-42dd-9ed0-78951b7fab6d\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/dimension-domain\" xlink:from=\"loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_a1a98189-39e0-4131-8a99-eb57802063d7\" xlink:to=\"loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_a5a482db-81f0-42dd-9ed0-78951b7fab6d\" xlink:type=\"arc\" order=\"1\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_ConstructionInProgressMember_5cc2f84c-b4ab-4bd7-aea9-5cf30d46e8dd\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ConstructionInProgressMember\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/domain-member\" xlink:from=\"loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_a5a482db-81f0-42dd-9ed0-78951b7fab6d\" xlink:to=\"loc_us-gaap_ConstructionInProgressMember_5cc2f84c-b4ab-4bd7-aea9-5cf30d46e8dd\" xlink:type=\"arc\" order=\"0\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_MinorityInterestInLimitedPartnerships_3733a34a-3b57-4508-b51e-c1be6cc2a317\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MinorityInterestInLimitedPartnerships\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/domain-member\" xlink:from=\"loc_us-gaap_MinorityInterestLineItems_37f39cc8-586e-4097-a088-f5411371a916\" xlink:to=\"loc_us-gaap_MinorityInterestInLimitedPartnerships_3733a34a-3b57-4508-b51e-c1be6cc2a317\" xlink:type=\"arc\" order=\"0\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners_3322ddc1-267f-42eb-9940-94a4b8a56d3c\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/domain-member\" xlink:from=\"loc_us-gaap_MinorityInterestLineItems_37f39cc8-586e-4097-a088-f5411371a916\" xlink:to=\"loc_us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners_3322ddc1-267f-42eb-9940-94a4b8a56d3c\" xlink:type=\"arc\" order=\"1\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_PaymentsToAcquireInvestments_b48cccee-1297-4a2d-9398-9122bb7cc37c\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsToAcquireInvestments\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/domain-member\" xlink:from=\"loc_us-gaap_MinorityInterestLineItems_37f39cc8-586e-4097-a088-f5411371a916\" xlink:to=\"loc_us-gaap_PaymentsToAcquireInvestments_b48cccee-1297-4a2d-9398-9122bb7cc37c\" xlink:type=\"arc\" order=\"2\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_ContributionOfProperty_c31c4af7-4888-45cb-b69c-d3579cf6ce36\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ContributionOfProperty\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/domain-member\" xlink:from=\"loc_us-gaap_MinorityInterestLineItems_37f39cc8-586e-4097-a088-f5411371a916\" xlink:to=\"loc_us-gaap_ContributionOfProperty_c31c4af7-4888-45cb-b69c-d3579cf6ce36\" xlink:type=\"arc\" order=\"3\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_MinorityInterestOwnershipPercentageByParent_8e320ddb-9037-494e-aab4-57a8efb114d5\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MinorityInterestOwnershipPercentageByParent\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/domain-member\" xlink:from=\"loc_us-gaap_MinorityInterestLineItems_37f39cc8-586e-4097-a088-f5411371a916\" xlink:to=\"loc_us-gaap_MinorityInterestOwnershipPercentageByParent_8e320ddb-9037-494e-aab4-57a8efb114d5\" xlink:type=\"arc\" order=\"4\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_NumberOfRealEstateProperties_e8c54e29-8c61-43ad-918d-0e304d1285e7\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NumberOfRealEstateProperties\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/domain-member\" xlink:from=\"loc_us-gaap_MinorityInterestLineItems_37f39cc8-586e-4097-a088-f5411371a916\" xlink:to=\"loc_us-gaap_NumberOfRealEstateProperties_e8c54e29-8c61-43ad-918d-0e304d1285e7\" xlink:type=\"arc\" order=\"5\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_ProceedsFromMinorityShareholders_01181d8d-ec78-4e01-a7d2-1fa864401553\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromMinorityShareholders\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/domain-member\" xlink:from=\"loc_us-gaap_MinorityInterestLineItems_37f39cc8-586e-4097-a088-f5411371a916\" xlink:to=\"loc_us-gaap_ProceedsFromMinorityShareholders_01181d8d-ec78-4e01-a7d2-1fa864401553\" xlink:type=\"arc\" order=\"6\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest_dbd6d357-834f-4db5-a8f9-1ca95b190736\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/domain-member\" xlink:from=\"loc_us-gaap_MinorityInterestLineItems_37f39cc8-586e-4097-a088-f5411371a916\" xlink:to=\"loc_us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest_dbd6d357-834f-4db5-a8f9-1ca95b190736\" xlink:type=\"arc\" order=\"7\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_bxp_CarryingValuePercentOfTotal_1e307e0d-fa97-4386-b5d0-b63f9f710b64\" xlink:href=\"bxp-20231231.xsd#bxp_CarryingValuePercentOfTotal\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/domain-member\" xlink:from=\"loc_us-gaap_MinorityInterestLineItems_37f39cc8-586e-4097-a088-f5411371a916\" xlink:to=\"loc_bxp_CarryingValuePercentOfTotal_1e307e0d-fa97-4386-b5d0-b63f9f710b64\" xlink:type=\"arc\" order=\"8\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_bxp_DifferenceBetweenPurchasePriceAndCarryingValue_288ff9ba-df74-4bba-99e9-517794e1e515\" xlink:href=\"bxp-20231231.xsd#bxp_DifferenceBetweenPurchasePriceAndCarryingValue\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/domain-member\" xlink:from=\"loc_us-gaap_MinorityInterestLineItems_37f39cc8-586e-4097-a088-f5411371a916\" xlink:to=\"loc_bxp_DifferenceBetweenPurchasePriceAndCarryingValue_288ff9ba-df74-4bba-99e9-517794e1e515\" xlink:type=\"arc\" order=\"9\"/>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_bxp_DifferenceBetweenProceedsFromSaleAndNoncontrollingInterest_c2d67603-d640-4046-ba80-313701021e44\" xlink:href=\"bxp-20231231.xsd#bxp_DifferenceBetweenProceedsFromSaleAndNoncontrollingInterest\"/>\n    <link:definitionArc xlink:arcrole=\"http://xbrl.org/int/dim/arcrole/domain-member\" xlink:from=\"loc_us-gaap_MinorityInterestLineItems_37f39cc8-586e-4097-a088-f5411371a916\" xlink:to=\"loc_bxp_DifferenceBetweenProceedsFromSaleAndNoncontrollingInterest_c2d67603-d640-4046-ba80-313701021e44\" xlink:type=\"arc\" order=\"10\"/>\n  </link:definitionLink>\n  </link:linkbase>\n\n\n##Label linkbase document\n<?xml version='1.0' encoding='UTF-8'?>\n<link:linkbase xmlns:link=\"http://www.xbrl.org/2003/linkbase\" xmlns:xlink=\"http://www.w3.org/1999/xlink\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:schemaLocation=\"http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd\"><link:roleRef roleURI=\"http://www.xbrl.org/2009/role/negatedPeriodStartLabel\" xlink:type=\"simple\" xlink:href=\"http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodStartLabel\"/>\n  <link:roleRef roleURI=\"http://www.xbrl.org/2009/role/netLabel\" xlink:type=\"simple\" xlink:href=\"http://www.xbrl.org/lrr/role/net-2009-12-16.xsd#netLabel\"/>\n  <link:roleRef roleURI=\"http://www.xbrl.org/2009/role/negatedNetLabel\" xlink:type=\"simple\" xlink:href=\"http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedNetLabel\"/>\n  <link:roleRef roleURI=\"http://www.xbrl.org/2009/role/negatedTerseLabel\" xlink:type=\"simple\" xlink:href=\"http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTerseLabel\"/>\n  <link:roleRef roleURI=\"http://www.xbrl.org/2009/role/negatedPeriodEndLabel\" xlink:type=\"simple\" xlink:href=\"http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodEndLabel\"/>\n  <link:roleRef roleURI=\"http://www.xbrl.org/2009/role/negatedLabel\" xlink:type=\"simple\" xlink:href=\"http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel\"/>\n  <link:roleRef roleURI=\"http://www.xbrl.org/2009/role/negatedTotalLabel\" xlink:type=\"simple\" xlink:href=\"http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTotalLabel\"/>\n  <link:labelLink xlink:role=\"http://www.xbrl.org/2003/role/link\" xlink:type=\"extended\"><link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_LongtermDebtTypeAxis\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_us-gaap_LongtermDebtTypeAxis\" xlink:to=\"lab_us-gaap_LongtermDebtTypeAxis\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_us-gaap_LongtermDebtTypeAxis_840ec621-e382-475b-9200-7f71c6b9ce0a_terseLabel_en-US\" xlink:label=\"lab_us-gaap_LongtermDebtTypeAxis\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Long-term Debt, Type [Axis]</link:label>\n    <link:label id=\"lab_us-gaap_LongtermDebtTypeAxis_label_en-US\" xlink:label=\"lab_us-gaap_LongtermDebtTypeAxis\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Long-Term Debt, Type [Axis]</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis\" xlink:to=\"lab_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_cba65252-e9be-4555-a510-24a8a2220859_terseLabel_en-US\" xlink:label=\"lab_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Finite-Lived Intangible Assets by Major Class [Axis]</link:label>\n    <link:label id=\"lab_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_label_en-US\" xlink:label=\"lab_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Finite-Lived Intangible Assets by Major Class [Axis]</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_CashMember\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashMember\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_us-gaap_CashMember\" xlink:to=\"lab_us-gaap_CashMember\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_us-gaap_CashMember_dfd06078-6235-447d-9876-6cf69ffa39ec_terseLabel_en-US\" xlink:label=\"lab_us-gaap_CashMember\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Cash</link:label>\n    <link:label id=\"lab_us-gaap_CashMember_label_en-US\" xlink:label=\"lab_us-gaap_CashMember\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Cash [Member]</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_bxp_ThreeSixZeroParkAvenueSouthMember\" xlink:href=\"bxp-20231231.xsd#bxp_ThreeSixZeroParkAvenueSouthMember\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_bxp_ThreeSixZeroParkAvenueSouthMember\" xlink:to=\"lab_bxp_ThreeSixZeroParkAvenueSouthMember\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_bxp_ThreeSixZeroParkAvenueSouthMember_5f1f09d8-d930-47d1-870a-2189b7d9a78b_terseLabel_en-US\" xlink:label=\"lab_bxp_ThreeSixZeroParkAvenueSouthMember\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">360 Park Avenue South</link:label>\n    <link:label id=\"lab_bxp_ThreeSixZeroParkAvenueSouthMember_label_en-US\" xlink:label=\"lab_bxp_ThreeSixZeroParkAvenueSouthMember\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Three Six Zero Park Avenue South [Member]</link:label>\n    <link:label id=\"lab_bxp_ThreeSixZeroParkAvenueSouthMember_documentation_en-US\" xlink:label=\"lab_bxp_ThreeSixZeroParkAvenueSouthMember\" xlink:role=\"http://www.xbrl.org/2003/role/documentation\" xlink:type=\"resource\" xml:lang=\"en-US\">Three Six Zero Park Avenue South</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_bxp_PlatformSixteenThreeSixZeroParkAvenueSouthTwoZeroZeroFifthAvenueAndSafecoPlazaMember\" xlink:href=\"bxp-20231231.xsd#bxp_PlatformSixteenThreeSixZeroParkAvenueSouthTwoZeroZeroFifthAvenueAndSafecoPlazaMember\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_bxp_PlatformSixteenThreeSixZeroParkAvenueSouthTwoZeroZeroFifthAvenueAndSafecoPlazaMember\" xlink:to=\"lab_bxp_PlatformSixteenThreeSixZeroParkAvenueSouthTwoZeroZeroFifthAvenueAndSafecoPlazaMember\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_bxp_PlatformSixteenThreeSixZeroParkAvenueSouthTwoZeroZeroFifthAvenueAndSafecoPlazaMember_d2fb9d32-9fdf-466c-8571-a3070e4c0bd2_terseLabel_en-US\" xlink:label=\"lab_bxp_PlatformSixteenThreeSixZeroParkAvenueSouthTwoZeroZeroFifthAvenueAndSafecoPlazaMember\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Platform Sixteen, Three Six Zero Park Avenue South, Two Zero Zero Fifth Avenue and Safeco Plaza</link:label>\n    <link:label id=\"lab_bxp_PlatformSixteenThreeSixZeroParkAvenueSouthTwoZeroZeroFifthAvenueAndSafecoPlazaMember_label_en-US\" xlink:label=\"lab_bxp_PlatformSixteenThreeSixZeroParkAvenueSouthTwoZeroZeroFifthAvenueAndSafecoPlazaMember\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Platform Sixteen, Three Six Zero Park Avenue South, Two Zero Zero Fifth Avenue and Safeco Plaza [Member]</link:label>\n    <link:label id=\"lab_bxp_PlatformSixteenThreeSixZeroParkAvenueSouthTwoZeroZeroFifthAvenueAndSafecoPlazaMember_documentation_en-US\" xlink:label=\"lab_bxp_PlatformSixteenThreeSixZeroParkAvenueSouthTwoZeroZeroFifthAvenueAndSafecoPlazaMember\" xlink:role=\"http://www.xbrl.org/2003/role/documentation\" xlink:type=\"resource\" xml:lang=\"en-US\">Platform Sixteen, Three Six Zero Park Avenue South, Two Zero Zero Fifth Avenue and Safeco Plaza</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_bxp_NineZeroOneNewYorkAvenueMember\" xlink:href=\"bxp-20231231.xsd#bxp_NineZeroOneNewYorkAvenueMember\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_bxp_NineZeroOneNewYorkAvenueMember\" xlink:to=\"lab_bxp_NineZeroOneNewYorkAvenueMember\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_bxp_NineZeroOneNewYorkAvenueMember_a42fef0e-265f-4a6b-bac1-32747d3a825b_terseLabel_en-US\" xlink:label=\"lab_bxp_NineZeroOneNewYorkAvenueMember\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">901 New York Avenue</link:label>\n    <link:label id=\"lab_bxp_NineZeroOneNewYorkAvenueMember_label_en-US\" xlink:label=\"lab_bxp_NineZeroOneNewYorkAvenueMember\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Nine Zero One New York Avenue [Member]</link:label>\n    <link:label id=\"lab_bxp_NineZeroOneNewYorkAvenueMember_documentation_en-US\" xlink:label=\"lab_bxp_NineZeroOneNewYorkAvenueMember\" xlink:role=\"http://www.xbrl.org/2003/role/documentation\" xlink:type=\"resource\" xml:lang=\"en-US\">Nine Zero One New York Avenue</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain\" xlink:href=\"https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain\" xlink:to=\"lab_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_a41b448e-8681-4386-93b1-dbd815858ca9_terseLabel_en-US\" xlink:label=\"lab_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Name of Property [Domain]</link:label>\n    <link:label id=\"lab_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_label_en-US\" xlink:label=\"lab_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Name of Property [Domain]</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_CashAndCashEquivalentsAxis\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashAndCashEquivalentsAxis\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_us-gaap_CashAndCashEquivalentsAxis\" xlink:to=\"lab_us-gaap_CashAndCashEquivalentsAxis\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_us-gaap_CashAndCashEquivalentsAxis_a44720df-2865-451e-925a-b95f29e692f6_terseLabel_en-US\" xlink:label=\"lab_us-gaap_CashAndCashEquivalentsAxis\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Cash and Cash Equivalents [Axis]</link:label>\n    <link:label id=\"lab_us-gaap_CashAndCashEquivalentsAxis_label_en-US\" xlink:label=\"lab_us-gaap_CashAndCashEquivalentsAxis\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Cash and Cash Equivalents [Axis]</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_srt_OwnershipDomain\" xlink:href=\"https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_OwnershipDomain\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_srt_OwnershipDomain\" xlink:to=\"lab_srt_OwnershipDomain\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_srt_OwnershipDomain_b26761e1-50ce-42a5-bf66-8b2c4731bdc5_terseLabel_en-US\" xlink:label=\"lab_srt_OwnershipDomain\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Ownership [Domain]</link:label>\n    <link:label id=\"lab_srt_OwnershipDomain_label_en-US\" xlink:label=\"lab_srt_OwnershipDomain\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Ownership [Domain]</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_LeaseAgreementsMember\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LeaseAgreementsMember\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_us-gaap_LeaseAgreementsMember\" xlink:to=\"lab_us-gaap_LeaseAgreementsMember\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_us-gaap_LeaseAgreementsMember_ff0ce4f0-94d7-49de-83af-d3a2571f7e6b_terseLabel_en-US\" xlink:label=\"lab_us-gaap_LeaseAgreementsMember\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Lease Agreements</link:label>\n    <link:label id=\"lab_us-gaap_LeaseAgreementsMember_label_en-US\" xlink:label=\"lab_us-gaap_LeaseAgreementsMember\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Lease Agreements [Member]</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis\" xlink:href=\"https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis\" xlink:to=\"lab_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_f4dd1150-da7d-4ad8-b463-26a77134be08_terseLabel_en-US\" xlink:label=\"lab_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Name of Property [Axis]</link:label>\n    <link:label id=\"lab_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_label_en-US\" xlink:label=\"lab_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Name of Property [Axis]</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_MinorityInterestInLimitedPartnerships\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MinorityInterestInLimitedPartnerships\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_us-gaap_MinorityInterestInLimitedPartnerships\" xlink:to=\"lab_us-gaap_MinorityInterestInLimitedPartnerships\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_us-gaap_MinorityInterestInLimitedPartnerships_2f1744ae-f876-41b8-81db-338b1fd7dac4_verboseLabel_en-US\" xlink:label=\"lab_us-gaap_MinorityInterestInLimitedPartnerships\" xlink:role=\"http://www.xbrl.org/2003/role/verboseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Property partnerships</link:label>\n    <link:label id=\"lab_us-gaap_MinorityInterestInLimitedPartnerships_89c12d7a-782c-4dff-8cf1-692a416c94a5_terseLabel_en-US\" xlink:label=\"lab_us-gaap_MinorityInterestInLimitedPartnerships\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Noncontrolling Interest in Limited Partnerships</link:label>\n    <link:label id=\"lab_us-gaap_MinorityInterestInLimitedPartnerships_label_en-US\" xlink:label=\"lab_us-gaap_MinorityInterestInLimitedPartnerships\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Noncontrolling Interest in Limited Partnerships</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_bxp_CarryingValuePercentOfTotal\" xlink:href=\"bxp-20231231.xsd#bxp_CarryingValuePercentOfTotal\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_bxp_CarryingValuePercentOfTotal\" xlink:to=\"lab_bxp_CarryingValuePercentOfTotal\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_bxp_CarryingValuePercentOfTotal_39833bd7-a9df-4d4c-9960-5629a701a7db_terseLabel_en-US\" xlink:label=\"lab_bxp_CarryingValuePercentOfTotal\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Carrying Value, Percent of Total</link:label>\n    <link:label id=\"lab_bxp_CarryingValuePercentOfTotal_label_en-US\" xlink:label=\"lab_bxp_CarryingValuePercentOfTotal\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Carrying Value, Percent of Total</link:label>\n    <link:label id=\"lab_bxp_CarryingValuePercentOfTotal_documentation_en-US\" xlink:label=\"lab_bxp_CarryingValuePercentOfTotal\" xlink:role=\"http://www.xbrl.org/2003/role/documentation\" xlink:type=\"resource\" xml:lang=\"en-US\">Carrying Value, Percent of Total</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_bxp_CapitalMember\" xlink:href=\"bxp-20231231.xsd#bxp_CapitalMember\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_bxp_CapitalMember\" xlink:to=\"lab_bxp_CapitalMember\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_bxp_CapitalMember_aedb8bf4-c802-4378-b5b4-fd7bdae3a699_terseLabel_en-US\" xlink:label=\"lab_bxp_CapitalMember\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Total Capital [Member]</link:label>\n    <link:label id=\"lab_bxp_CapitalMember_label_en-US\" xlink:label=\"lab_bxp_CapitalMember\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Capital [Member]</link:label>\n    <link:label id=\"lab_bxp_CapitalMember_documentation_en-US\" xlink:label=\"lab_bxp_CapitalMember\" xlink:role=\"http://www.xbrl.org/2003/role/documentation\" xlink:type=\"resource\" xml:lang=\"en-US\">Capital [Member]</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis\" xlink:href=\"https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis\" xlink:to=\"lab_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_cf8fc79c-23f6-43a6-83af-310e5f4f5d93_terseLabel_en-US\" xlink:label=\"lab_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Investment, Name [Axis]</link:label>\n    <link:label id=\"lab_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_label_en-US\" xlink:label=\"lab_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Investment, Name [Axis]</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_PaymentsToAcquireInvestments\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsToAcquireInvestments\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_us-gaap_PaymentsToAcquireInvestments\" xlink:to=\"lab_us-gaap_PaymentsToAcquireInvestments\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_us-gaap_PaymentsToAcquireInvestments_98e5fcd2-344b-4691-b137-c73b338a7a80_terseLabel_en-US\" xlink:label=\"lab_us-gaap_PaymentsToAcquireInvestments\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Payments to Acquire Investments</link:label>\n    <link:label id=\"lab_us-gaap_PaymentsToAcquireInvestments_label_en-US\" xlink:label=\"lab_us-gaap_PaymentsToAcquireInvestments\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Payments to Acquire Investments</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_bxp_SantaMonicaBusinessParkMember\" xlink:href=\"bxp-20231231.xsd#bxp_SantaMonicaBusinessParkMember\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_bxp_SantaMonicaBusinessParkMember\" xlink:to=\"lab_bxp_SantaMonicaBusinessParkMember\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_bxp_SantaMonicaBusinessParkMember_bb5c7b32-9bc9-44e4-8021-6ce6acbdec61_terseLabel_en-US\" xlink:label=\"lab_bxp_SantaMonicaBusinessParkMember\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Santa Monica Business Park [Member]</link:label>\n    <link:label id=\"lab_bxp_SantaMonicaBusinessParkMember_127762f2-62f6-49fc-8b21-956d2cf3b6da_verboseLabel_en-US\" xlink:label=\"lab_bxp_SantaMonicaBusinessParkMember\" xlink:role=\"http://www.xbrl.org/2003/role/verboseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">SMBP Venture LP [Member]</link:label>\n    <link:label id=\"lab_bxp_SantaMonicaBusinessParkMember_label_en-US\" xlink:label=\"lab_bxp_SantaMonicaBusinessParkMember\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Santa Monica Business Park [Member]</link:label>\n    <link:label id=\"lab_bxp_SantaMonicaBusinessParkMember_documentation_en-US\" xlink:label=\"lab_bxp_SantaMonicaBusinessParkMember\" xlink:role=\"http://www.xbrl.org/2003/role/documentation\" xlink:type=\"resource\" xml:lang=\"en-US\">Santa Monica Business Park [Member]</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_bxp_ThreeTwoFiveMainStreetThreeFiveFiveMainStreetNinetyBroadwayAndKendallCenterGreenGaragePropertiesMember\" xlink:href=\"bxp-20231231.xsd#bxp_ThreeTwoFiveMainStreetThreeFiveFiveMainStreetNinetyBroadwayAndKendallCenterGreenGaragePropertiesMember\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_bxp_ThreeTwoFiveMainStreetThreeFiveFiveMainStreetNinetyBroadwayAndKendallCenterGreenGaragePropertiesMember\" xlink:to=\"lab_bxp_ThreeTwoFiveMainStreetThreeFiveFiveMainStreetNinetyBroadwayAndKendallCenterGreenGaragePropertiesMember\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_bxp_ThreeTwoFiveMainStreetThreeFiveFiveMainStreetNinetyBroadwayAndKendallCenterGreenGaragePropertiesMember_21207a44-69e2-4bc0-a9f5-acec64e3b451_terseLabel_en-US\" xlink:label=\"lab_bxp_ThreeTwoFiveMainStreetThreeFiveFiveMainStreetNinetyBroadwayAndKendallCenterGreenGaragePropertiesMember\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">325 Main Street, 355 Main Street, 90 Broadway and Kendall Center Green Garage Properties [Member]</link:label>\n    <link:label id=\"lab_bxp_ThreeTwoFiveMainStreetThreeFiveFiveMainStreetNinetyBroadwayAndKendallCenterGreenGaragePropertiesMember_label_en-US\" xlink:label=\"lab_bxp_ThreeTwoFiveMainStreetThreeFiveFiveMainStreetNinetyBroadwayAndKendallCenterGreenGaragePropertiesMember\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Three Two Five Main Street, Three Five Five Main Street, Ninety Broadway and Kendall Center Green Garage Properties [Member]</link:label>\n    <link:label id=\"lab_bxp_ThreeTwoFiveMainStreetThreeFiveFiveMainStreetNinetyBroadwayAndKendallCenterGreenGaragePropertiesMember_documentation_en-US\" xlink:label=\"lab_bxp_ThreeTwoFiveMainStreetThreeFiveFiveMainStreetNinetyBroadwayAndKendallCenterGreenGaragePropertiesMember\" xlink:role=\"http://www.xbrl.org/2003/role/documentation\" xlink:type=\"resource\" xml:lang=\"en-US\">Three Two Five Main Street, Three Five Five Main Street, Ninety Broadway and Kendall Center Green Garage Properties</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_ContributionOfProperty\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ContributionOfProperty\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_us-gaap_ContributionOfProperty\" xlink:to=\"lab_us-gaap_ContributionOfProperty\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_us-gaap_ContributionOfProperty_93991eac-c7e0-4a33-be68-cca8f4d1b6bf_terseLabel_en-US\" xlink:label=\"lab_us-gaap_ContributionOfProperty\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Non-cash contributions from noncontrolling interest in property partnerhips</link:label>\n    <link:label id=\"lab_us-gaap_ContributionOfProperty_f7f46375-653a-49cb-9490-4f08d19b7f6a_verboseLabel_en-US\" xlink:label=\"lab_us-gaap_ContributionOfProperty\" xlink:role=\"http://www.xbrl.org/2003/role/verboseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Contribution of Property</link:label>\n    <link:label id=\"lab_us-gaap_ContributionOfProperty_label_en-US\" xlink:label=\"lab_us-gaap_ContributionOfProperty\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Contribution of Property</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_NumberOfRealEstateProperties\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NumberOfRealEstateProperties\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_us-gaap_NumberOfRealEstateProperties\" xlink:to=\"lab_us-gaap_NumberOfRealEstateProperties\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_us-gaap_NumberOfRealEstateProperties_3f816890-75b3-445e-93c0-39c467328873_terseLabel_en-US\" xlink:label=\"lab_us-gaap_NumberOfRealEstateProperties\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Number of real estate properties</link:label>\n    <link:label id=\"lab_us-gaap_NumberOfRealEstateProperties_label_en-US\" xlink:label=\"lab_us-gaap_NumberOfRealEstateProperties\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Number of Real Estate Properties</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_bxp_JointVenturePartnerMember\" xlink:href=\"bxp-20231231.xsd#bxp_JointVenturePartnerMember\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_bxp_JointVenturePartnerMember\" xlink:to=\"lab_bxp_JointVenturePartnerMember\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_bxp_JointVenturePartnerMember_6bfb1943-c2b4-4e26-ad7e-cdf1a3b8b308_terseLabel_en-US\" xlink:label=\"lab_bxp_JointVenturePartnerMember\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Joint Venture Partner [Member]</link:label>\n    <link:label id=\"lab_bxp_JointVenturePartnerMember_label_en-US\" xlink:label=\"lab_bxp_JointVenturePartnerMember\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Joint Venture Partner [Member]</link:label>\n    <link:label id=\"lab_bxp_JointVenturePartnerMember_documentation_en-US\" xlink:label=\"lab_bxp_JointVenturePartnerMember\" xlink:role=\"http://www.xbrl.org/2003/role/documentation\" xlink:type=\"resource\" xml:lang=\"en-US\">Joint Venture Partner [Member]</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_AdditionalPaidInCapitalMember\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AdditionalPaidInCapitalMember\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_us-gaap_AdditionalPaidInCapitalMember\" xlink:to=\"lab_us-gaap_AdditionalPaidInCapitalMember\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_us-gaap_AdditionalPaidInCapitalMember_9d9d316c-d838-4da1-a476-b321aa08dca7_terseLabel_en-US\" xlink:label=\"lab_us-gaap_AdditionalPaidInCapitalMember\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Additional Paid-In Capital [Member]</link:label>\n    <link:label id=\"lab_us-gaap_AdditionalPaidInCapitalMember_label_en-US\" xlink:label=\"lab_us-gaap_AdditionalPaidInCapitalMember\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Additional Paid-in Capital [Member]</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_CommercialRealEstateMember\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommercialRealEstateMember\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_us-gaap_CommercialRealEstateMember\" xlink:to=\"lab_us-gaap_CommercialRealEstateMember\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_us-gaap_CommercialRealEstateMember_48b23dc0-6ede-4d9a-a01d-11debe41e578_terseLabel_en-US\" xlink:label=\"lab_us-gaap_CommercialRealEstateMember\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Commercial Real Estate Properties [Member]</link:label>\n    <link:label id=\"lab_us-gaap_CommercialRealEstateMember_label_en-US\" xlink:label=\"lab_us-gaap_CommercialRealEstateMember\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Commercial Real Estate [Member]</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_UnconsolidatedPropertiesMember\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnconsolidatedPropertiesMember\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_us-gaap_UnconsolidatedPropertiesMember\" xlink:to=\"lab_us-gaap_UnconsolidatedPropertiesMember\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_us-gaap_UnconsolidatedPropertiesMember_29be9362-3613-428a-914c-0f4e3215ecf0_terseLabel_en-US\" xlink:label=\"lab_us-gaap_UnconsolidatedPropertiesMember\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Unconsolidated Properties</link:label>\n    <link:label id=\"lab_us-gaap_UnconsolidatedPropertiesMember_label_en-US\" xlink:label=\"lab_us-gaap_UnconsolidatedPropertiesMember\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Unconsolidated Properties [Member]</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis\" xlink:to=\"lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis_316001b9-9054-4fad-8cfe-6f22a78246cb_terseLabel_en-US\" xlink:label=\"lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Property, Plant and Equipment, Type [Axis]</link:label>\n    <link:label id=\"lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis_label_en-US\" xlink:label=\"lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Long-Lived Tangible Asset [Axis]</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis\" xlink:href=\"https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis\" xlink:to=\"lab_srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis_62367f52-f11e-42f0-94ac-f6649ef9202a_terseLabel_en-US\" xlink:label=\"lab_srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Real Estate, Type of Property [Axis]</link:label>\n    <link:label id=\"lab_srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis_label_en-US\" xlink:label=\"lab_srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis\" xlink:role=\"http://www.xbrl.org/2003/role/label\" xlink:type=\"resource\" xml:lang=\"en-US\">Real Estate, Type of Property [Axis]</link:label>\n    <link:loc xlink:type=\"locator\" xlink:label=\"loc_us-gaap_EquityComponentDomain\" xlink:href=\"https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityComponentDomain\"/>\n    <link:labelArc xlink:arcrole=\"http://www.xbrl.org/2003/arcrole/concept-label\" xlink:from=\"loc_us-gaap_EquityComponentDomain\" xlink:to=\"lab_us-gaap_EquityComponentDomain\" xlink:type=\"arc\" order=\"1\"/>\n    <link:label id=\"lab_us-gaap_EquityComponentDomain_73bbb56c-ae32-4ba9-82d9-edcccdae4602_terseLabel_en-US\" xlink:label=\"lab_us-gaap_EquityComponentDomain\" xlink:role=\"http://www.xbrl.org/2003/role/terseLabel\" xlink:type=\"resource\" xml:lang=\"en-US\">Equity Component [Domain]</link:label>\n    <link:label id=\"lab_us-gaap_EquityComponentDomain_label_en-US\" xlink:label=\"lab_us-gaap_EquityComponentDomain\" xl\n\n##Instance document\n<?xml version='1.0' encoding='UTF-8'?>\n<xbrl xmlns=\"http://www.xbrl.org/2003/instance\" xmlns:bxp=\"http://www.bxp.com/20231231\" xmlns:dei=\"http://xbrl.sec.gov/dei/2023\" 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dimension=\"us-gaap:StatementEquityComponentsAxis\">bxp:CapitalMember</xbrldi:explicitMember>\n            </segment>\n        </entity>\n        <period>\n            <startDate>2023-01-01</startDate>\n            <endDate>2023-12-31</endDate>\n        </period>\n    </context>\n\t<context id=\"c-144\">\n        <entity>\n            <identifier scheme=\"http://www.sec.gov/CIK\">0001037540</identifier>\n            <segment>\n                <xbrldi:explicitMember dimension=\"us-gaap:CashAndCashEquivalentsAxis\">us-gaap:CashMember</xbrldi:explicitMember>\n                <xbrldi:explicitMember dimension=\"dei:LegalEntityAxis\">bxp:BostonPropertiesLimitedPartnershipMember</xbrldi:explicitMember>\n            </segment>\n        </entity>\n        <period>\n            <startDate>2023-01-01</startDate>\n            <endDate>2023-12-31</endDate>\n        </period>\n    </context>\n\t<context id=\"c-145\">\n        <entity>\n            <identifier scheme=\"http://www.sec.gov/CIK\">0001037540</identifier>\n            <segment>\n                <xbrldi:explicitMember dimension=\"us-gaap:CashAndCashEquivalentsAxis\">us-gaap:CashMember</xbrldi:explicitMember>\n                <xbrldi:explicitMember dimension=\"dei:LegalEntityAxis\">bxp:BostonPropertiesLimitedPartnershipMember</xbrldi:explicitMember>\n            </segment>\n        </entity>\n        <period>\n            <startDate>2022-01-01</startDate>\n            <endDate>2022-12-31</endDate>\n        </period>\n    </context>\n\t<context id=\"c-146\">\n        <entity>\n            <identifier scheme=\"http://www.sec.gov/CIK\">0001037540</identifier>\n            <segment>\n                <xbrldi:explicitMember dimension=\"us-gaap:CashAndCashEquivalentsAxis\">us-gaap:CashMember</xbrldi:explicitMember>\n                <xbrldi:explicitMember dimension=\"dei:LegalEntityAxis\">bxp:BostonPropertiesLimitedPartnershipMember</xbrldi:explicitMember>\n            </segment>\n        </entity>\n        <period>\n            <startDate>2021-01-01</startDate>\n            <endDate>2021-12-31</endDate>\n        </period>\n    </context>\n\t<context id=\"c-568\">\n        <entity>\n            <identifier scheme=\"http://www.sec.gov/CIK\">0001037540</identifier>\n            <segment>\n                <xbrldi:explicitMember dimension=\"srt:RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis\">bxp:ThreeZeroZeroBinneyStreetMember</xbrldi:explicitMember>\n            </segment>\n        </entity>\n        <period>\n            <startDate>2023-11-13</startDate>\n            <endDate>2023-11-13</endDate>\n        </period>\n    </context>\n\t<context id=\"c-570\">\n        <entity>\n            <identifier scheme=\"http://www.sec.gov/CIK\">0001037540</identifier>\n            <segment>\n                <xbrldi:explicitMember dimension=\"srt:RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis\">bxp:ThreeZeroZeroBinneyStreetMember</xbrldi:explicitMember>\n            </segment>\n        </entity>\n        <period>\n            <startDate>2023-12-14</startDate>\n            <endDate>2023-12-31</endDate>\n        </period>\n    </context>\n\t<context id=\"c-569\">\n        <entity>\n            <identifier scheme=\"http://www.sec.gov/CIK\">0001037540</identifier>\n            <segment>\n                <xbrldi:explicitMember dimension=\"srt:RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis\">bxp:ThreeZeroZeroBinneyStreetMember</xbrldi:explicitMember>\n            </segment>\n        </entity>\n        <period>\n            <instant>2023-11-13</instant>\n        </period>\n    </context>\n\t<unit id=\"usd\">\n        <measure>iso4217:USD</measure>\n    </unit>\n\t<unit id=\"shares\">\n        <measure>shares</measure>\n    </unit>\n\t<unit id=\"usdPerShare\">\n        <divide>\n            <unitNumerator>\n                <measure>iso4217:USD</measure>\n            </unitNumerator>\n            <unitDenominator>\n                <measure>shares</measure>\n            </unitDenominator>\n        </divide>\n    </unit>\n\t<unit id=\"number\">\n        <measure>pure</measure>\n    </unit>\n\t<unit id=\"real_estate_properties\">\n        <measure>bxp:Real_Estate_Properties</measure>\n    </unit>\n\t<unit id=\"y\">\n        <measure>utr:Y</measure>\n    </unit>\n\t<unit id=\"sqft\">\n        <measure>utr:sqft</measure>\n    </unit>\n\t<unit id=\"acre\">\n        <measure>utr:acre</measure>\n    </unit>\n\t<unit id=\"buildings\">\n        <measure>bxp:buildings</measure>\n    </unit>\n\t<unit id=\"building\">\n        <measure>bxp:Building</measure>\n    </unit>\n\t<unit id=\"vehicles\">\n        <measure>bxp:Vehicles</measure>\n    </unit>\n\t<unit id=\"year\">\n        <measure>bxp:Year</measure>\n    </unit>\n\t<unit id=\"integer\">\n        <measure>bxp:Integer</measure>\n    </unit>\n\t<unit id=\"floor\">\n        <measure>bxp:floor</measure>\n    </unit>\n\t<unit id=\"rate\">\n        <measure>utr:Rate</measure>\n    </unit>\n\t<unit id=\"m\">\n        <measure>utr:M</measure>\n    </unit>\n\t<unit id=\"buildings2\">\n        <measure>bxp:Buildings</measure>\n    </unit>\n\t<unit id=\"days\">\n        <measure>bxp:days</measure>\n    </unit>\n\t<unit id=\"nonemployeedirectors\">\n        <measure>bxp:nonemployeedirectors</measure>\n    </unit>\n\t<us-gaap:MinorityInterestInLimitedPartnerships contextRef=\"c-10\" decimals=\"-3\" id=\"f-201\" unitRef=\"usd\">1640704000</us-gaap:MinorityInterestInLimitedPartnerships>\n\t<us-gaap:MinorityInterestInLimitedPartnerships contextRef=\"c-11\" decimals=\"-3\" id=\"f-202\" unitRef=\"usd\">1547317000</us-gaap:MinorityInterestInLimitedPartnerships>\n\t<us-gaap:MinorityInterestInLimitedPartnerships contextRef=\"c-10\" decimals=\"-8\" id=\"f-2529\" unitRef=\"usd\">1600000000</us-gaap:MinorityInterestInLimitedPartnerships>\n\t<us-gaap:MinorityInterestInLimitedPartnerships contextRef=\"c-11\" decimals=\"-8\" id=\"f-2530\" unitRef=\"usd\">1500000000</us-gaap:MinorityInterestInLimitedPartnerships>\n\t<us-gaap:MinorityInterestOwnershipPercentageByNoncontrollingOwners contextRef=\"c-235\" decimals=\"2\" id=\"f-1678\" unitRef=\"number\">0.45</us-gaap:MinorityInterestOwnershipPercentageByNoncontrollingOwners>\n\t<us-gaap:MinorityInterestOwnershipPercentageByNoncontrollingOwners contextRef=\"c-564\" decimals=\"2\" id=\"f-2532\" unitRef=\"number\">0.45</us-gaap:MinorityInterestOwnershipPercentageByNoncontrollingOwners>\n\t<us-gaap:MinorityInterestOwnershipPercentageByNoncontrollingOwners contextRef=\"c-564\" decimals=\"2\" id=\"f-2535\" unitRef=\"number\">0.45</us-gaap:MinorityInterestOwnershipPercentageByNoncontrollingOwners>\n\t<us-gaap:MinorityInterestOwnershipPercentageByNoncontrollingOwners contextRef=\"c-567\" decimals=\"2\" id=\"f-2539\" unitRef=\"number\">0.45</us-gaap:MinorityInterestOwnershipPercentageByNoncontrollingOwners>\n\t<us-gaap:MinorityInterestOwnershipPercentageByNoncontrollingOwners contextRef=\"c-235\" decimals=\"2\" id=\"f-2541\" unitRef=\"number\">0.45</us-gaap:MinorityInterestOwnershipPercentageByNoncontrollingOwners>\n\t<us-gaap:MinorityInterestOwnershipPercentageByNoncontrollingOwners contextRef=\"c-235\" decimals=\"2\" id=\"f-2545\" unitRef=\"number\">0.45</us-gaap:MinorityInterestOwnershipPercentageByNoncontrollingOwners>\n\t<us-gaap:PaymentsToAcquireInvestments contextRef=\"c-215\" decimals=\"-3\" id=\"f-1630\" unitRef=\"usd\">38000000</us-gaap:PaymentsToAcquireInvestments>\n\t<us-gaap:PaymentsToAcquireInvestments contextRef=\"c-406\" decimals=\"-3\" id=\"f-2188\" unitRef=\"usd\">38000000</us-gaap:PaymentsToAcquireInvestments>\n\t<us-gaap:PaymentsToAcquireInvestments contextRef=\"c-410\" decimals=\"INF\" id=\"f-2193\" unitRef=\"usd\">1</us-gaap:PaymentsToAcquireInvestments>\n\t<us-gaap:PaymentsToAcquireInvestments contextRef=\"c-565\" decimals=\"-3\" id=\"f-2533\" unitRef=\"usd\">4800000</us-gaap:PaymentsToAcquireInvestments>\n\t<us-gaap:PaymentsToAcquireInvestments contextRef=\"c-566\" decimals=\"-3\" id=\"f-2536\" unitRef=\"usd\">5900000</us-gaap:PaymentsToAcquireInvestments>\n\t<us-gaap:PaymentsToAcquireInvestments contextRef=\"c-781\" decimals=\"-3\" id=\"f-3314\" unitRef=\"usd\">10000000</us-gaap:PaymentsToAcquireInvestments>\n\t<us-gaap:ContributionOfProperty contextRef=\"c-1\" decimals=\"-3\" id=\"f-700\" unitRef=\"usd\">17519000</us-gaap:ContributionOfProperty>\n\t<us-gaap:ContributionOfProperty contextRef=\"c-14\" decimals=\"-3\" id=\"f-701\" unitRef=\"usd\">0</us-gaap:ContributionOfProperty>\n\t<us-gaap:ContributionOfProperty contextRef=\"c-15\" decimals=\"-3\" id=\"f-702\" unitRef=\"usd\">0</us-gaap:ContributionOfProperty>\n\t<us-gaap:ContributionOfProperty contextRef=\"c-2\" decimals=\"-3\" id=\"f-1340\" unitRef=\"usd\">17519000</us-gaap:ContributionOfProperty>\n\t<us-gaap:ContributionOfProperty contextRef=\"c-90\" decimals=\"-3\" id=\"f-1341\" unitRef=\"usd\">0</us-gaap:ContributionOfProperty>\n\t<us-gaap:ContributionOfProperty contextRef=\"c-91\" decimals=\"-3\" id=\"f-1342\" unitRef=\"usd\">0</us-gaap:ContributionOfProperty>\n\t<us-gaap:ContributionOfProperty contextRef=\"c-565\" decimals=\"-3\" id=\"f-2534\" unitRef=\"usd\">17500000</us-gaap:ContributionOfProperty>\n\t<us-gaap:ContributionOfProperty contextRef=\"c-566\" decimals=\"-3\" id=\"f-2537\" unitRef=\"usd\">21400000</us-gaap:ContributionOfProperty>\n\t<us-gaap:MinorityInterestOwnershipPercentageByParent contextRef=\"c-563\" decimals=\"INF\" id=\"f-2531\" unitRef=\"number\">0.55</us-gaap:MinorityInterestOwnershipPercentageByParent>\n\t<us-gaap:MinorityInterestOwnershipPercentageByParent contextRef=\"c-563\" decimals=\"2\" id=\"f-2538\" unitRef=\"number\">0.55</us-gaap:MinorityInterestOwnershipPercentageByParent>\n\t<us-gaap:MinorityInterestOwnershipPercentageByParent contextRef=\"c-235\" decimals=\"2\" id=\"f-2543\" unitRef=\"number\">0.55</us-gaap:MinorityInterestOwnershipPercentageByParent>\n\t<us-gaap:NumberOfRealEstateProperties contextRef=\"c-6\" decimals=\"0\" id=\"f-61\" unitRef=\"real_estate_properties\">6</us-gaap:NumberOfRealEstateProperties>\n\t<us-gaap:NumberOfRealEstateProperties contextRef=\"c-7\" decimals=\"INF\" id=\"f-62\" unitRef=\"number\">4</us-gaap:NumberOfRealEstateProperties>\n\t<us-gaap:NumberOfRealEstateProperties contextRef=\"c-151\" decimals=\"0\" id=\"f-1402\" unitRef=\"real_estate_properties\">188</us-gaap:NumberOfRealEstateProperties>\n\t<us-gaap:NumberOfRealEstateProperties contextRef=\"c-152\" decimals=\"0\" id=\"f-1404\" unitRef=\"real_estate_properties\">10</us-gaap:NumberOfRealEstateProperties>\n\t<us-gaap:NumberOfRealEstateProperties contextRef=\"c-153\" decimals=\"0\" id=\"f-1406\" unitRef=\"real_estate_properties\">167</us-gaap:NumberOfRealEstateProperties>\n\t<us-gaap:NumberOfRealEstateProperties contextRef=\"c-154\" decimals=\"0\" id=\"f-1407\" unitRef=\"real_estate_properties\">7</us-gaap:NumberOfRealEstateProperties>\n\t<us-gaap:NumberOfRealEstateProperties contextRef=\"c-155\" decimals=\"0\" id=\"f-1408\" unitRef=\"real_estate_properties\">14</us-gaap:NumberOfRealEstateProperties>\n\t<us-gaap:NumberOfRealEstateProperties contextRef=\"c-156\" decimals=\"0\" id=\"f-1409\" unitRef=\"real_estate_properties\">2</us-gaap:NumberOfRealEstateProperties>\n\t<us-gaap:NumberOfRealEstateProperties contextRef=\"c-6\" decimals=\"0\" id=\"f-1410\" unitRef=\"real_estate_properties\">6</us-gaap:NumberOfRealEstateProperties>\n\t<us-gaap:NumberOfRealEstateProperties contextRef=\"c-157\" decimals=\"0\" id=\"f-1411\" unitRef=\"real_estate_properties\">1</us-gaap:NumberOfRealEstateProperties>\n\t<us-gaap:NumberOfRealEstateProperties contextRef=\"c-158\" decimals=\"0\" id=\"f-1412\" unitRef=\"real_estate_proper\n\n##US GAAP Taxonomy\n[Concept Core]\nID: srt:OwnershipAxis\nLabel: Ownership [Axis]\nType: xbrli:stringItemType | Balance: None | PeriodType: duration | Abstract: True\nStatus: None | DeprecatedLabel: None | DeprecatedDate: None\nDocumentation:\nInformation by name of entity in which ownership interest is disclosed. Excludes equity method investee and named security investment.\n\nProvenance: file=GAAP_Taxonomy_2024.xlsx | sheet=Concepts | row=474\n\n\n[Concept Core]\nID: us-gaap:NoncontrollingInterestMember\nLabel: Noncontrolling Interest [Member]\nType: dtr-types:domainItemType | Balance: None | PeriodType: duration | Abstract: True\nStatus: None | DeprecatedLabel: None | DeprecatedDate: None\nDocumentation:\nThis element represents that portion of equity (net assets) in a subsidiary not attributable, directly or indirectly, to the parent. A noncontrolling interest is sometimes called a minority interest.\n\nProvenance: file=GAAP_Taxonomy_2024.xlsx | sheet=Concepts | row=8840\n\n\n[Concept Relations]\nID: srt:OwnershipAxis\n\nPresentation:\n- Role: http://fasb.org/us-gaap/role/statement/CommonDomainMembers\n  Path: Statement [Table] > Ownership [Axis]\n  PreferredLabel: None\n- Role: http://fasb.org/us-gaap/role/statement/CommonDomainMembers\n  Path: Ownership [Axis] > Ownership [Domain]\n  PreferredLabel: None\n- Role: http://fasb.org/us-gaap/role/disclosure/OrganizationConsolidationAndPresentationOfFinancialStatements\n  Path: Consolidation, Less-than-Wholly-Owned Subsidiary, Parent Ownership Interest, Effect of Change [Table] > Ownership [Axis]\n  PreferredLabel: None\n- Role: http://fasb.org/us-gaap/role/disclosure/OrganizationConsolidationAndPresentationOfFinancialStatements\n  Path: Ownership [Axis] > Ownership [Domain]\n  PreferredLabel: None\n- Role: http://fasb.org/us-gaap/role/disclosure/MinorityInterest\n  Path: Consolidation, Less-than-Wholly-Owned Subsidiary, Parent Ownership Interest, Effect of Change [Table] > Ownership [Axis]\n  PreferredLabel: None\n- Role: http://fasb.org/us-gaap/role/disclosure/MinorityInterest\n  Path: Ownership [Axis] > Ownership [Domain]\n  PreferredLabel: None\n- Role: http://fasb.org/us-gaap/role/disclosure/MinorityInterest\n  Path: Noncontrolling Interest [Table] > Ownership [Axis]\n  PreferredLabel: None\n- Role: http://fasb.org/us-gaap/role/disclosure/MinorityInterest\n  Path: Ownership [Axis] > Ownership [Domain]\n  PreferredLabel: None\n- Role: http://fasb.org/us-gaap/role/disclosure/MinorityInterest\n  Path: Redeemable Noncontrolling Interest [Table] > Ownership [Axis]\n  PreferredLabel: None\n- Role: http://fasb.org/us-gaap/role/disclosure/MinorityInterest\n  Path: Ownership [Axis] > Ownership [Domain]\n  PreferredLabel: None\n- Role: http://fasb.org/us-gaap/role/disclosure/BusinessCombinations\n  Path: Schedule of Business Acquisitions, by Acquisition [Table] > Ownership [Axis]\n  PreferredLabel: None\n- Role: http://fasb.org/us-gaap/role/disclosure/BusinessCombinations\n  Path: Ownership [Axis] > Ownership [Domain]\n  PreferredLabel: None\nProvenance: sheets include Presentation-like sheets\n\n\n[Concept Relations]\nID: srt:OwnershipAxis\n\nDefinition (Dimensions/Domain/Hypercube):\n- http://xbrl.org/int/dim/arcrole/hypercube-dimension: from=us-gaap:StatementTable -> to=srt:OwnershipAxis (role=http://fasb.org/us-gaap/role/statement/CommonDomainMembersStatementTable)\n- http://xbrl.org/int/dim/arcrole/dimension-domain: from=srt:OwnershipAxis -> to=srt:OwnershipDomain (role=http://fasb.org/us-gaap/role/statement/CommonDomainMembersStatementTable)\n- http://xbrl.org/int/dim/arcrole/dimension-default: from=srt:OwnershipAxis -> to=srt:OwnershipDomain (role=http://fasb.org/us-gaap/role/statement/CommonDomainMembersStatementTable)\n- http://xbrl.org/int/dim/arcrole/hypercube-dimension: from=us-gaap:ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTable -> to=srt:OwnershipAxis (role=http://fasb.org/us-gaap/role/disclosure/OrganizationConsolidationAndPresentationOfFinancialStatementsConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTable)\n- http://xbrl.org/int/dim/arcrole/dimension-domain: from=srt:OwnershipAxis -> to=srt:OwnershipDomain (role=http://fasb.org/us-gaap/role/disclosure/OrganizationConsolidationAndPresentationOfFinancialStatementsConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTable)\n- http://xbrl.org/int/dim/arcrole/dimension-default: from=srt:OwnershipAxis -> to=srt:OwnershipDomain (role=http://fasb.org/us-gaap/role/disclosure/OrganizationConsolidationAndPresentationOfFinancialStatementsConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTable)\n- http://xbrl.org/int/dim/arcrole/hypercube-dimension: from=us-gaap:ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTable -> to=srt:OwnershipAxis (role=http://fasb.org/us-gaap/role/disclosure/MinorityInterestConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTable)\n- http://xbrl.org/int/dim/arcrole/dimension-domain: from=srt:OwnershipAxis -> to=srt:OwnershipDomain (role=http://fasb.org/us-gaap/role/disclosure/MinorityInterestConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTable)\n- http://xbrl.org/int/dim/arcrole/dimension-default: from=srt:OwnershipAxis -> to=srt:OwnershipDomain (role=http://fasb.org/us-gaap/role/disclosure/MinorityInterestConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTable)\n- http://xbrl.org/int/dim/arcrole/hypercube-dimension: from=us-gaap:MinorityInterestTable -> to=srt:OwnershipAxis (role=http://fasb.org/us-gaap/role/disclosure/MinorityInterest)\n- http://xbrl.org/int/dim/arcrole/dimension-domain: from=srt:OwnershipAxis -> to=srt:OwnershipDomain (role=http://fasb.org/us-gaap/role/disclosure/MinorityInterest)\n- http://xbrl.org/int/dim/arcrole/dimension-default: from=srt:OwnershipAxis -> to=srt:OwnershipDomain (role=http://fasb.org/us-gaap/role/disclosure/MinorityInterest)\n- http://xbrl.org/int/dim/arcrole/hypercube-dimension: from=us-gaap:RedeemableNoncontrollingInterestByLegalEntityTable -> to=srt:OwnershipAxis (role=http://fasb.org/us-gaap/role/disclosure/MinorityInterestRedeemableNoncontrollingInterestByLegalEntityTable)\n- http://xbrl.org/int/dim/arcrole/dimension-domain: from=srt:OwnershipAxis -> to=srt:OwnershipDomain (role=http://fasb.org/us-gaap/role/disclosure/MinorityInterestRedeemableNoncontrollingInterestByLegalEntityTable)\n- http://xbrl.org/int/dim/arcrole/dimension-default: from=srt:OwnershipAxis -> to=srt:OwnershipDomain (role=http://fasb.org/us-gaap/role/disclosure/MinorityInterestRedeemableNoncontrollingInterestByLegalEntityTable)\n- http://xbrl.org/int/dim/arcrole/hypercube-dimension: from=us-gaap:ScheduleOfBusinessAcquisitionsByAcquisitionTable -> to=srt:OwnershipAxis (role=http://fasb.org/us-gaap/role/disclosure/BusinessCombinationsScheduleOfBusinessAcquisitionsByAcquisitionTable)\n- http://xbrl.org/int/dim/arcrole/dimension-domain: from=srt:OwnershipAxis -> to=srt:OwnershipDomain (role=http://fasb.org/us-gaap/role/disclosure/BusinessCombinationsScheduleOfBusinessAcquisitionsByAcquisitionTable)\n- http://xbrl.org/int/dim/arcrole/dimension-default: from=srt:OwnershipAxis -> to=srt:OwnershipDomain (role=http://fasb.org/us-gaap/role/disclosure/BusinessCombinationsScheduleOfBusinessAcquisitionsByAcquisitionTable)\nProvenance: sheets include Definition-like sheets\n\n\n[Concept Relations]\nID: srt:OwnershipAxis\n\nReferences:\n- Taxonomy Implementation Guide | None | None\nProvenance: sheets include Reference-like sheets\n\n\n[Concept Relations]\nID: us-gaap:NoncontrollingInterestMember\n\nPresentation:\n- Role: http://fasb.org/us-gaap/role/statement/StatementOfShareholdersEquityAndOtherComprehensiveIncome\n  Path: Equity Component [Domain] > Noncontrolling Interest [Member]\n  PreferredLabel: None\n- Role: http://fasb.org/us-gaap/role/statement/StatementOfShareholdersEquityAndOtherComprehensiveIncome\n  Path: Noncontrolling Interest [Member] > AOCI Attributable to Noncontrolling Interest [Member]\n  PreferredLabel: None\n- Role: http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsurance\n  Path: Parent [Member] > Noncontrolling Interest [Member]\n  PreferredLabel: None\n- Role: http://fasb.org/us-gaap/role/disclosure/MinorityInterest\n  Path: Equity Component [Domain] > Noncontrolling Interest [Member]\n  PreferredLabel: None\n- Role: http://fasb.org/us-gaap/role/disclosure/MinorityInterest\n  Path: Equity Component [Domain] > Noncontrolling Interest [Member]\n  PreferredLabel: None\n- Role: http://fasb.org/us-gaap/role/disclosure/Equity\n  Path: Equity Component [Domain] > Noncontrolling Interest [Member]\n  PreferredLabel: None\n- Role: http://fasb.org/us-gaap/role/disclosure/Equity\n  Path: Noncontrolling Interest [Member] > AOCI Attributable to Noncontrolling Interest [Member]\n  PreferredLabel: None\n- Role: http://fasb.org/us-gaap/role/disclosure/Equity\n  Path: Equity Component [Domain] > Noncontrolling Interest [Member]\n  PreferredLabel: None\n- Role: http://fasb.org/us-gaap/role/disclosure/Equity\n  Path: Noncontrolling Interest [Member] > AOCI Attributable to Noncontrolling Interest [Member]\n  PreferredLabel: None\n- Role: http://fasb.org/us-gaap/role/disclosure/FinancialServicesInvestmentCompany\n  Path: Equity Component [Domain] > Noncontrolling Interest [Member]\n  PreferredLabel: None\n- Role: http://fasb.org/us-gaap/role/disclosure/FinancialServicesInvestmentCompany\n  Path: Noncontrolling Interest [Member] > AOCI Attributable to Noncontrolling Interest [Member]\n  PreferredLabel: None\nProvenance: sheets include Presentation-like sheets\n\n\n[Concept Relations]\nID: us-gaap:NoncontrollingInterestMember\n\nDefinition (Dimensions/Domain/Hypercube):\n- http://xbrl.org/int/dim/arcrole/domain-member: from=us-gaap:EquityComponentDomain -> to=us-gaap:NoncontrollingInterestMember (role=http://fasb.org/us-gaap/role/statement/StatementOfShareholdersEquityAndOtherComprehensiveIncomeStatementTable)\n- http://xbrl.org/int/dim/arcrole/domain-member: from=us-gaap:NoncontrollingInterestMember -> to=us-gaap:AociAttributableToNoncontrollingInterestMember (role=http://fasb.org/us-gaap/role/statement/StatementOfShareholdersEquityAndOtherComprehensiveIncomeStatementTable)\n- http://xbrl.org/int/dim/arcrole/domain-member: from=us-gaap:EquityComponentDomain -> to=us-gaap:NoncontrollingInterestMember (role=http://fasb.org/us-gaap/role/statement/StatementOfShareholdersEquityAndOtherComprehensiveIncomeStatementTable)\n- http://xbrl.org/int/dim/arcrole/domain-member: from=us-gaap:NoncontrollingInterestMember -> to=us-gaap:AociAttributableToNoncontrollingInterestMember (role=http://fasb.org/us-gaap/role/statement/StatementOfShareholdersEquityAndOtherComprehensiveIncomeStatementTable)\n- http://xbrl.org/int/dim/arcrole/domain-member: from=us-gaap:ParentMember -> to=us-gaap:NoncontrollingInterestMember (role=http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsuranceNewAccountingPronouncementsOrChangeInAccountingPrincipleTable)\n- http://xbrl.org/int/dim/arcrole/domain-member: from=us-gaap:ParentMember -> to=us-gaap:NoncontrollingInterestMember (role=http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsuranceNewAccountingPronouncementsOrChangeInAccountingPrincipleTable)\n- http://xbrl.org/int/dim/arcrole/domain-member: from=us-gaap:EquityComponentDomain -> to=us-gaap:NoncontrollingInterestMember (role=http://fasb.org/us-gaap/role/disclosure/MinorityInterestConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTable)\n- http://xbrl.org/int/dim/arcrole/domain-member: from=us-gaap:EquityComponentDomain -> to=us-gaap:NoncontrollingInterestMember (role=http://fasb.org/us-gaap/role/disclosure/MinorityInterestConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTable)\n- http://xbrl.org/int/dim/arcrole/domain-member: from=us-gaap:EquityComponentDomain -> to=us-gaap:NoncontrollingInterestMember (role=http://fasb.org/us-gaap/role/disclosure/MinorityInterest)\n- http://xbrl.org/int/dim/arcrole/domain-member: from=us-gaap:EquityComponentDomain -> to=us-gaap:NoncontrollingInterestMember (role=http://fasb.org/us-gaap/role/disclosure/MinorityInterest)\n- http://xbrl.org/int/dim/arcrole/domain-member: from=us-gaap:EquityComponentDomain -> to=us-gaap:NoncontrollingInterestMember (role=http://fasb.org/us-gaap/role/disclosure/FinancialServicesInvestmentCompanyInvestmentCompanyChangesInNetAssetsTable)\n- http://xbrl.org/int/dim/arcrole/domain-member: from=us-gaap:NoncontrollingInterestMember -> to=us-gaap:AociAttributableToNoncontrollingInterestMember (role=http://fasb.org/us-gaap/role/disclosure/FinancialServicesInvestmentCompanyInvestmentCompanyChangesInNetAssetsTable)\n- http://xbrl.org/int/dim/arcrole/domain-member: from=us-gaap:EquityComponentDomain -> to=us-gaap:NoncontrollingInterestMember (role=http://fasb.org/us-gaap/role/disclosure/FinancialServicesInvestmentCompanyInvestmentCompanyChangesInNetAssetsTable)\n- http://xbrl.org/int/dim/arcrole/domain-member: from=us-gaap:NoncontrollingInterestMember -> to=us-gaap:AociAttributableToNoncontrollingInterestMember (role=http://fasb.org/us-gaap/role/disclosure/FinancialServicesInvestmentCompanyInvestmentCompanyChangesInNetAssetsTable)\n- http://xbrl.org/int/dim/arcrole/domain-member: from=us-gaap:EquityComponentDomain -> to=us-gaap:NoncontrollingInterestMember (role=http://fasb.org/us-gaap/role/disclosure/EquityAccumulatedOtherComprehensiveIncomeLossTable)\n- http://xbrl.org/int/dim/arcrole/domain-member: from=us-gaap:NoncontrollingInterestMember -> to=us-gaap:AociAttributableToNoncontrollingInterestMember (role=http://fasb.org/us-gaap/role/disclosure/EquityAccumulatedOtherComprehensiveIncomeLossTable)\n- http://xbrl.org/int/dim/arcrole/domain-member: from=us-gaap:EquityComponentDomain -> to=us-gaap:NoncontrollingInterestMember (role=http://fasb.org/us-gaap/role/disclosure/EquityAccumulatedOtherComprehensiveIncomeLossTable)\n- http://xbrl.org/int/dim/arcrole/domain-member: from=us-gaap:NoncontrollingInterestMember -> to=us-gaap:AociAttributableToNoncontrollingInterestMember (role=http://fasb.org/us-gaap/role/disclosure/EquityAccumulatedOtherComprehensiveIncomeLossTable)\n- http://xbrl.org/int/dim/arcrole/domain-member: from=us-gaap:EquityComponentDomain -> to=us-gaap:NoncontrollingInterestMember (role=http://fasb.org/us-gaap/role/disclosure/EquityReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable)\n- http://xbrl.org/int/dim/arcrole/domain-member: from=us-gaap:NoncontrollingInterestMember -> to=us-gaap:AociAttributableToNoncontrollingInterestMember (role=http://fasb.org/us-gaap/role/disclosure/EquityReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable)\n- http://xbrl.org/int/dim/arcrole/domain-member: from=us-gaap:EquityComponentDomain -> to=us-gaap:NoncontrollingInterestMember (role=http://fasb.org/us-gaap/role/disclosure/EquityReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable)\n- http://xbrl.org/int/dim/arcrole/domain-member: from=us-gaap:NoncontrollingInterestMember -> to=us-gaap:AociAttributableToNoncontrollingInterestMember (role=http://fasb.org/us-gaap/role/disclosure/EquityReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable)\nProvenance: sheets include Definition-like sheets\n\n\n[Concept Relations]\nID: us-gaap:NoncontrollingInterestMember\n\nReferences:\n- Disclosure Improvements | None | None\n- BDC:Taxonomy Technical Improvement | None | None\nProvenance: sheets include Reference-like sheets\n\nQuestion: What erroneous relationship type exists between srt:OwnershipAxis and us-gaap:NoncontrollingInterestMember, based on the provided XBRL filing and the US GAAP taxonomy?\nAnswer:\n\n    "

Answer: "CombinationErr"