Readymades of Marcel Duchamp to turn up any identical matches to photographs of the originals. However, there are accounts of Walter Arensberg and Joseph Stella being with Duchamp when he purchased the original "Fountain" at J. L. Mott Iron Works. Such investigations are hampered by the fact that few of the original "readymades" survive, having been lost or destroyed. Those that still exist are predominantly reproductions authorized or designed by Duchamp in the final two decades of his life. Shearer also asserts that the artwork "L.H.O.O.Q." which is recorded to be a poster-copy of the "Mona Lisa" with a moustache drawn on it, is
Marcel Duchamp Duchamp later submitted the painting to the 1913 "Armory Show" in New York City. In addition to displaying works of American artists, this show was the first major exhibition of modern trends coming out of Paris, encompassing experimental styles of the European avant-garde, including Fauvism, Cubism, and Futurism. American show-goers, accustomed to realistic art, were scandalized, and the "Nude" was at the center of much of the controversy. At about this time, Duchamp read Max Stirner's philosophical tract, "The Ego and Its Own", the study which he considered another turning point in his artistic and intellectual development. He called it