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
Fountain (Duchamp) porcelain, with a signature reproduced in black paint. Of all the artworks in this series of readymades, "Fountain" is perhaps the best known because the symbolic meaning of the toilet takes the conceptual challenge posed by the readymades to their most visceral extreme. Similarly, philosopher Stephen Hicks argued that Duchamp, who was quite familiar with the history of European art, was obviously making a provocative statement with "Fountain": Since the photograph taken by Stieglitz is the only image of the original sculpture, there are some interpretations of "Fountain" by looking not only at reproductions but this particular photograph. Tomkins notes