**Exhibit 31.1****CERTIFICATION**I, Mark R. Keller, certify that: 1. I have reviewed this Amendment No. 1 to the Annual Report on Form 10-K/A of RepublicProperty Trust;  2. Based on my knowledge, this report does not contain any untrue statement of amaterial fact or omit to state a material fact necessary to make the statements made, inlight of the circumstances under which such statements were made, not misleading withrespect to the period covered by this report;  3. Based on my knowledge, the financial statements, and other financial informationincluded in this report, fairly present in all material respects the financial condition,results of operations and cash flows of the registrant as of, and for, the periodspresented in this report;  4. The registrant’s other certifying officer and I are responsible for establishing andmaintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e)and 15d-15(e)) and internal control over financial reporting (as defined in Exchange ActRules 13a-15(f) and 15d-15(f)) for the registrant and have: a) designed such disclosure controls and procedures or, caused such disclosurecontrols and procedures to be designed under our supervision, to ensure that materialinformation relating to the registrant, including its consolidated subsidiaries, ismade known to us by others within those entities, particularly during the period inwhich this report is being prepared;  b) designed such internal controls and procedures, or caused such disclosurecontrols and procedures to be designed under our supervision, to provide reasonableassurance regarding the reliability of financial reporting and the preparation offinancial statements for external purposes in accordance with generally acceptedaccounting principles;  c) evaluated the effectiveness of the registrant’s disclosure controls andprocedures and presented in this report our conclusions about the effectiveness of thedisclosure controls and procedures, as of the end of the period covered by this reportbased on such evaluation; and  d) disclosed in this report any change in the registrant’s internal control overfinancial reporting that occurred during the registrant’s most recent fiscal quarterthat has materially affected, or is reasonably likely to materially affect, theregistrant’s internal control over financial reporting; and 5. The registrant’s other certifying officer and I have disclosed, based on our mostrecent evaluation of internal control over financial reporting, to the registrant’sauditors and the audit committee of registrant’s board of directors (or persons performingthe equivalent function): a) all significant deficiencies and material weaknesses in the design or operationof internal controls over financial reporting which are reasonably likely to adverselyaffect the registrant’s ability to record, process, summarize and report financial datainformation; and  b) any fraud, whether or not material, that involves management or other employeeswho have a significant role in the registrant’s internal control over financialreporting.         By:  /s/ Mark R. Keller       Mark R. KellerChief Executive Officer (principalexecutive officer)   Date: April 30, 2007
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