Harry F. Sinclair House
The Harry F. Sinclair House (also the Isaac D. Fletcher House or Fletcher–Sinclair Mansion) is a mansion at the southeast corner of East 79th Street and Fifth Avenue on the Upper East Side of Manhattan in New York City, New York, U.S. The house was built between 1897 and 1899. Over the first half of the 20th century, the house was successively the residence of businessmen Isaac D. Fletcher and Harry F. Sinclair, and then the descendants of Peter Stuyvesant, the last Director of New Netherland.