Georgia O'Keeffe received her 1916 exhibition at Alfred Stieglitz's New York gallery, 291.
The gallery was formally known as the Little Galleries of the Photo-Secession, but it became widely identified by its address at 291 Fifth Avenue. Stieglitz used it to show photography and avant-garde European and American art.
Anita Pollitzer brought O'Keeffe's charcoal abstractions to Stieglitz, who exhibited them at 291 without O'Keeffe's prior permission. The presentation was a turning point: it connected her work with a major New York network and led to a long professional relationship with Stieglitz.
The number 291 is sometimes mistaken for a museum name or a painting title. It refers to the gallery's street address. The venue closed in 1917, but Stieglitz continued promoting O'Keeffe through later galleries, including the Anderson Galleries and An American Place.