In addition to his career as a photographer, Stieglitz was an active promoter of modern art. He ran his first art gallery, the Little Gallery of the Photo-Secession, also known as 291, after its Fifth Avenue address. From 1905 to 1917, he exhibited photography as fine art and helped introduce American audiences to the European avant-garde. Edward Steichen, Henri Matisse, and Marcel Duchamp—to name but a few—all gained critical recognition there. Stieglitz later shifted his focus to the emerging American modern art scene, opening An American Place in 1929. There he presented solo exhibitions of painters such as Arthur Dove, John Marin, and Georgia O’Keeffe, whom he married in 1924.