Did Joseph Hirshhorn pay for the museum?

Hirshhorn Plaza

No, the Hirshhorn Museum is primarily federally funded, as it is a part of the Smithsonian Institution. Joseph H. Hirshhorn (1899-1981) gave his extensive art collection to the nation in 1966 and later contributed $1 million to the Smithsonian Institution toward the construction of the Hirshhorn building designed by Gordon Bunshaft.