The National Archives runs the other presidential libraries from Herbert Hoover's onward, with financial help from private foundations tied to the presidents' families. The system began in 1939, when Franklin D. Roosevelt donated to the federal government his presidential papers as well as land on his Hyde Park estate, where a library would be built. Private funds would pay for the facility but the government would own and run it. In 1955 Congress and Dwight Eisenhower enacted the Presidential Libraries Act, stipulating that a similar arrangement would govern the libraries for all successive presidents (as well as for Herbert Hoover, who was still alive).