Part of the Smithsonian institution, the Hirshhorn is one of America's "big five" modern art museums. The plan of the building is circular, like the Guggenheim and also like a space ship, which makes it unique given the surrounding architecture of monuments on the National Mall. In a sense, the building itself is the object of abstract art.
Just over 40 years old, the Hirshhorn is a place of art, criticism, and dialogue in its history and in the contents within the museum. The sculpture garden is unique and hosts a spectrum of things from a wishing tree to works by Rodin. The Hirshhorn has thousands of pieces and boasts contemporary exhibits year round.
The website has a 40th anniversary timeline which shows the spectrum of work the museum's hosted since its inception.
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