Howard Gould, son of railroad tycoon
Jay Gould, began construction of the estate after purchasing the land in 1900. Initially, the plan was to build a castle that was to be a replica of
Kilkenny Castle. Castle Gould, as it came to be called, was intended to be used as the main house. However, the Goulds did not like the castle, so they decided to create another house on the estate to serve as the main dwelling. After the completion of the house in 1912, the Goulds sold the estate to
Daniel Guggenheim in 1917. The name of the main house was changed to Hempstead House (the limestone stables and the servants' quarters are still called Castle Gould). In 1942, the Guggenheims donated the estate to the
Institute of Aeronautical Sciences. Soon after acquiring the estate, the institute sold it to the U.S. Navy, which held it from 1946 to 1967. The U.S. government declared the estate as surplus and eventually gave the deed of the property to
Nassau County, New York in 1971. ==Film==