Fort Greene Park is a city-owned and -operated park in Fort Greene, Brooklyn, New York City. The 30.2-acre (12.2 ha) park was originally named after the fort formerly located there, Fort Putnam, which itself was named for Rufus Putnam, George Washington's Chief of Engineers in the Revolutionary War. Renamed in 1812 for Nathanael Greene, a hero of the American Revolutionary War, it was redesigned by Frederick Law Olmsted and Calvert Vaux, who also designed Central Park and Prospect Park, in 1867. The park contains the Prison Ship Martyrs' Monument, which includes a crypt designed by Olmsted and Vaux.