291 is the commonly known name for an internationally famous art gallery that was located in Midtown Manhattan at 291 Fifth Avenue in New York City from 1905 to 1917. Originally called the "Little Galleries of the Photo-Secession", the gallery was established and managed by photographer Alfred Stieglitz.

The gallery is recognized for two achievements: First, its exhibitions 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. (Sourced from Wikipedia May 2023)