The gallery is noted for two reasons. First, the exhibitions there helped bring art photography to the same stature in America as painting and sculpture. Pioneering artistic photographers such as Stieglitz, Edward Steichen, Alvin Langdon Coburn, Gertrude Käsebier and Clarence H. White all gained critical recognition through exhibitions at 291. Equally important, Stieglitz used this space to introduce to the United States some of the most avant-garde European artists of the time, including Henri Matisse, Auguste Rodin, Henri Rousseau, Paul Cézanne, Pablo Picasso, Constantin Brâncuși, and the Dadaists Francis Picabia and Marcel Duchamp.