In late 1912, painters Walter Pach, Arthur B. Davies and Walt Kuhn organized a modern art show, and Stieglitz lent a few modern art pieces from 291 to the show. He also agreed to be listed as an honorary vice-president of the exhibition along with Claude Monet, Odilon Redon, Mabel Dodge and Isabella Stewart Gardner. In February 1913, the watershed Armory Show opened in New York, and soon modern art was a major topic of discussion throughout the city. He saw the popularity of the show as a vindication of the work that he had been sponsoring at 291 for the past five years. He mounted an exhibition of his own photographs at 291 to run at the same time as the Armory Show. He later wrote that allowing people to see both photographs and modern paintings at the same time "afforded the best opportunity to the student and public for a clearer understanding of the place and purpose of the two media."
