The Whitney Museum of American Art houses some 12,000 works of 20th- and 21st-century American art, including paintings, sculptures, drawings, photographs, and prints, by about 2,000 artists. It contains the entirety of Edward Hopper's artistic estate, as well as pieces by artists such as Georgia O'Keefe, Kiki Smith, Louise Nevelson, and Andy Warhol. The museum also offers public programs including lectures, seminars, and performances. The museum is housed in a large granite building at the corner of Madison Avenue and 75th Street designed by the Hungarian-born, Bauhaus-trained architect Marcel Breuer. Whitney Museum of American Art was founded in 1930 by sculptor and art patron Gertrude Vanderbilt Whitney.