Stieglitz, Alfred (1864–1946)

US photographer. After forming the multimedia Photo-Secession Group with Edward Steichen in New York (1902), he started up the magazine Camera Work (1902–17). Through exhibitions at his gallery ‘291’ he helped to establish photography as an art form. In 1924 he married the painter Georgia O'Keeffe, who was the model in many of his photographs. His cloud series, the portraits of O'Keeffe, and his studies of New York City, are his most famous works.

Stieglitz was also instrumental in promoting modern art, both by European and American artists. He was the first exhibitor to show such painters and sculptors as Picasso, Cézanne, Rodin, Matisse, Brancusi, and O'Keeffe.