Held in 1913, the International Exhibition of Modern Art–known as the Armory Show–was the first major exhibition of European modern art in the U. S. After opening in February in the 69th Regiment Armory in New York City, the show traveled to Chicago and Boston. It was the first opportunity for many American artists, collectors, dealers and curators to see the avant-garde work of Pablo Picasso, Henri Matisse, Marcel Duchamp, Constantin Brâncuși and others in person. Web resource here. Video here.