In 1968, Dorothy Norman supported the establishment of the <a href="https://findartvalue.com/artist/alfred-stieglitz">Alfred Stieglitz</a> Center at the Philadelphia Museum of Art with an initial gift from her splendid collection of over 500 photographs by <a href="https://findartvalue.com/artist/alfred-stieglitz">Alfred Stieglitz</a>, <a href="https://findartvalue.com/artist/ansel-adams">Ansel Ad