Which photographer introduced Georgia O'Keeffe's drawings at his 291 gallery in 1916?

Alfred Stieglitz introduced Georgia O'Keeffe's drawings at his 291 gallery in 1916.

The gallery, commonly called 291 after its address at 291 Fifth Avenue in New York City, was founded and operated by Stieglitz. Anita Pollitzer showed him some of O'Keeffe's charcoal abstractions, and he exhibited them in a group show in 1916.

O'Keeffe was then teaching art in Texas and had not authorized Stieglitz to present the drawings as a major public introduction. She traveled to New York after learning about the exhibition, and the event began a relationship that profoundly affected both her career and personal life.

291 was important beyond O'Keeffe's debut. Stieglitz used it to display photography alongside European and American modernism, helping New York audiences encounter artists such as Pablo Picasso and Henri Matisse.