Which photographer founded the gallery 291, where Georgia O'Keeffe first exhibited in 1916?

Alfred Stieglitz founded the gallery 291, where Georgia O'Keeffe first exhibited in 1916.

The gallery was originally called the Little Galleries of the Photo-Secession and was located at 291 Fifth Avenue in New York City. It became known simply as 291 and presented photography alongside European and American modern art.

Stieglitz organized O'Keeffe's first exhibition there without her prior knowledge after seeing drawings she had sent to a friend. The show introduced her work to influential New York art circles and began a long professional relationship between the two artists.

291 also exhibited work by artists such as Pablo Picasso, Henri Matisse, and Constantin Brâncuși. Its program helped challenge the idea that photography and modern painting belonged to separate artistic worlds. The gallery closed in 1917, but Stieglitz continued promoting O'Keeffe at later galleries.