The New York gallery that showed Georgia O'Keeffe’s work under Alfred Stieglitz was 291.
The gallery was formally called the Little Galleries of the Photo-Secession and was located at 291 Fifth Avenue in Manhattan. Its address became its familiar name, and Stieglitz used the space to introduce American audiences to photography and European modern art.
O'Keeffe’s abstract charcoal drawings were first exhibited there in 1916. The presentation helped bring her work to the attention of New York’s modern-art world and began her long professional relationship with Stieglitz.
The gallery closed in 1917, but Stieglitz later operated other spaces, including the Intimate Gallery and An American Place. Those names are therefore related to his career but are not the gallery identified by the number 291.