Alfred Stieglitz ran the New York gallery known as 291.
The gallery opened in 1905 at 291 Fifth Avenue in Manhattan, giving it the address-based name “291.” Stieglitz originally called it the Little Galleries of the Photo-Secession, but the shorter name became standard.
291 displayed photography alongside avant-garde painting and sculpture. It introduced many American audiences to modern European artists, including Pablo Picasso, Henri Matisse, and Constantin Brâncuși. In 1916, Stieglitz exhibited Georgia O'Keeffe's abstract drawings there.
The gallery closed in 1917. Its exhibitions helped establish New York as an important center for modern art and gave O'Keeffe an early connection to the city's emerging avant-garde community.