Who first exhibited Georgia O'Keeffe's abstract drawings at the New York gallery 291?

Alfred Stieglitz first exhibited Georgia O'Keeffe’s abstract drawings at his New York gallery, 291.

Stieglitz showed a selection of her drawings in 1916 after receiving them from Anita Pollitzer, a friend of O'Keeffe’s. The exhibition introduced her work to an influential circle of American modernists and helped establish her public reputation.

The gallery was commonly known as 291, after its address at 291 Fifth Avenue in Manhattan. Stieglitz photographed O'Keeffe extensively and later became her husband, but his initial importance to her career was as an exhibitor and promoter.

The drawings were not conventional landscapes or portraits. Their abstract forms and strong contrasts helped distinguish O'Keeffe from the academic approaches she had studied earlier. The 1916 presentation is therefore an important milestone in the history of American modernism.