High Quality Content by WIKIPEDIA articles! The Central Troy Historic District is an irregularly-shaped, 96-acre (39 ha) area of downtown Troy, New York, United States. It has been described as "one of the most perfectly preserved 19th-century downtowns in the " with nearly 700 properties in a variety of architectural styles from the early 19th to mid-20th centuries. These include most of Russell Sage College, one of two privately-owned urban parks in New York, and two National Historic Landmarks. Visitors ranging from the Duke de la Rochefoucauld to Philip Johnson have praised aspects of it. Martin Scorsese used parts of downtown Troy as a stand-in for 19th-century Manhattan in The Age of Innocence.