Question: Schuyler Mansion contributes to the district recognized as historic in what year?

Context articles: Schuyler Mansion
Oak Hall Historic District
Shadow Brook Farm Historic District
South Carolina Governor's Mansion
Robesonia Furnace Historic District
Graceland (Elkins, West Virginia)
Schuyler Historic District
South End–Groesbeckville Historic District
Windsor Forge Mansion
Montour Falls Historic District

Schuyler Mansion is a historic house at 32 Catherine Street in Albany, New York, United States.
 The brick mansion is now a museum and an official National Historic Landmark.
 It was constructed from 1761 to 1765 for Philip Schuyler, later a general in the Continental Army and early U.S. Senator, who resided there from 1763 until his death in 1804.
 It was declared a National Historic Landmark on December 24, 1967.
 It is also a contributing property to the South End–Groesbeckville Historic District, listed on the National Register of Historic Places in 1984.
Oak Hall Historic District is a national historic district located at College Township, Centre County, Pennsylvania.
 The district includes 17 contributing buildings and 3 contributing structures in Oak Hall.
 The district includes the mansion house once owned by General James Irvin, the Irvin stone barn (c. 1825), and grist mill site.
 The Irvin Mansion was built about 1825, and is a 2 1/2-story, five bay limestone house with a center hall plan and gable roof.
 It features a mix of Georgian and Late Victorian style details.
 Associated with the mansion are a small shed, wagon shed / ice house, a smokehouse, and privy.
 The remains of the grist mill were rebuilt as a residence in 1961.
 Also in the district are the Johnstonbaugh House (c. 1825), Benjamin Peters House (c. 1860), and Garman House (1866).
Shadow Brook Farm Historic District is located in Stockbridge, Massachusetts.
 It is a historic district that includes six re-purposed farm buildings related to the former 'Shadowbrook' mansion destroyed by fire in 1956.
 Designed by architect H. Neill Wilson with landscaping by Frederick Law Olmsted, the mansion and farm buildings were built for Anson Phelps Stokes in 1893.
 Andrew Carnegie acquired Shadowbrook in 1917 and died there in 1919.
 It served as a Jesuit novitiate from 1922 until 1970.
 Following the fire, a non-equivalent structure of the same name took its place.
 Today the historic district primarily encompasses Berkshire Country Day School, which acquired its campus from the Stokes family in 1963.
 The historic district was added to the National Register of Historic Places in 1988.
The South Carolina Governor's Mansion (or the South Carolina Executive Mansion) is a historic U.S. governor's mansion in the Arsenal Hill neighborhood of Columbia, South Carolina and the official residence of the Governor of South Carolina.
 It is a Federal style home influenced by British Colonial plantations.
 The building has a white stucco exterior and originally served as faculty quarters for the Arsenal Academy which together with the Citadel Academy in Charleston formed The South Carolina Military Academy (now The Citadel).
 The Arsenal was burned along with the city of Columbia by Sherman's forces in February, 1865; the structure was the only surviving building and became South Carolina's executive mansion in 1868 On June 5, 1970, the building was registered with the U.S. National Register of Historic Places.
 The mansion is located on a single city block, and is surrounded by magnolia plants, elm and oak trees, and various other plants.
 It is accessed by a circular driveway around a fountain in front on the residence's main entrance.
 Scott Bolser oversees maintenance of the historic grounds at the mansion.
 The building has a flat roof and a large central pavilion around the main entrance.
 The mansion has 15 rooms (excluding powder rooms, security and staff offices, and the kitchen).
 It is located in Columbia Historic District I.
Robesonia Furnace Historic District, also known as Reading Furnace and Robesonia Iron Co. Ltd., is a historic "iron plantation" and national historic district located in Robesonia, Berks County, Pennsylvania.
 The district encompasses 35 contributing buildings and 2 contributing sites.
 They include 1 1/2-story single worker's housing built about 1825; stone, frame, and slag block duplexes built about 1845, 1890, and 1910; and bungalows built between about 1913 and 1915.
 Other notable buildings are the Second Empire style George Taylor Mansion (c. 1880), creamery building, and shed with cupola; log and stone furnace boarding house (c. 1800); miller's house (c. 1820); fire station (c. 1910); Georgian style ironmaster's mansion, or Ege Mansion (c. 1807); and Italianate style furnace office.
 The sites are the industrial remains of Robesonia Furnace, demolished in 1927 after acquisition by Bethlehem Steel.
 The furnace was established in 1794 by George Ege.
Graceland in Elkins, West Virginia is a historic mansion that was the summer home of Henry Gassaway Davis, a United States Senator from 1871–1883.
 The mansion was completed in 1893.
 It is listed separately on the National Register of Historic Places and is a designated National Historic Landmark.
 Graceland, along with Halliehurst and two other historic buildings on the campus of Davis & Elkins College, form a historic district listed on the National Register of Historic Places and known as the Davis and Elkins Historic District.
The Schuyler Historic District is a national historic district located in Schuyler, Virginia.
 It comprises 563.9 acre and includes 138 primary resources dating from its settlement period of the 1840s through the mid-20th century.
 A primary component are eight soapstone quarries located in Schuyler, with eight additional located just over the Albemarle County line.
 It represents a cohesive industrial community with the majority of its dwellings representative of vernacular regional building traditions.
 There is an “Executive Row” of dwellings overlooked the centrally located soapstone company from atop a bluff, with other quarry focused neighborhoods fanned out along adjacent hilltops.
The South End–Groesbeckville Historic District is located in part of the neighborhood of that name in Albany, New York, United States.
 It is a 26-block area south of the Mansion and Pastures neighborhoods with a mix of residential and commercial properties.
 In 1984 it was recognized as a historic district and listed on the National Register of Historic Places.
Windsor Forge Mansion, also known as Windsor Place, is a historic home and national historic district located at Caernarvon Township, Lancaster County, Pennsylvania.
 The district includes four contributing buildings and three contributing objects.
 The buildings are the Ironmaster's Mansion, stone smokehouse (c. 1765), stone spring house (c. 1765), and stone summer kitchen / servant's quarters (c. 1765).
 The three objects are pieces by noted artist and poet Blanche Nevin (1841-1925), who purchased Windsor Forge Mansion in 1899.
 Her grandfather Robert Jenkins (1769 - 1848) had previously been ironmaster and congressman.
 The oldest section of the Ironmaster's Mansion was built about 1742; the western section was built about 1765, and the connecting middle section about 1815.
 A shed roof porch was added in 1899, at which time it was generally renovated.
 The house is 2 1/2-stories and built of stone.
 Nevin added a studio to the house.
Montour Falls Historic District is a national historic district located at Montour Falls in Schuyler County, New York.
 The district includes 24 mid- and late-19th century structures.
 The visual focus of the district is known as the "Glorious T" around the intersection of Genesee and Main Streets.
 Notable structures include the Sheriff's Office, Schuyler County Clerk's Office, Montour Falls Village Hall, Montour Falls Memorial Library, and the Greek Revival style Ashton residence.