Through his work and writing, photographer Alfred Stieglitz was instrumental in establishing photography as a recognized fine art form. Some of Steiglitz's best-known photographs are of the painter Georgia O'Keeffe (who would eventually become his wife), and in line with his belief that great photography “becomes more real than reality,” these close-up portraits convey as much about form as they do about her personality and their relationship. Stieglitz was feverishly devoted to his work and mission and produced thousands of editions in his lifetime, covering numerous themes that captured a period of rapid transition in American society. In 1905, he opened 291 Gallery in New York City to promote pioneering photographers and avant-garde European artists. Stieglitz achieved his goal to have photography shown alongside painting and, due to his efforts, is known as an important proponent of early modernism and not only as a promoter of photography.