Alfred Stieglitz, Fountain by R. Mutt, 1917
In 1917, Marcel Duchamp bought a urinal, signed it in an assumed name of R. Mutt – the urinal had been bought from the J L Mott Ironworks – and submitted, with the title Fountain, it to the Society of Independent Artists in New York for inclusion in their annual exhibition. The rules stated that work by any artist who paid the fee would be accepted but the committee rejected Fountain. Much debate ensued. Eventually the board of the Society of Independent Artists – of which Duchamp was a member, but who in the main didn’t know he had submitted the work – decided that the work would be hidden from view for the show. Duchamp resigned in protest.
Fountain was photographed by Alfred Stieglitz but was subsequently lost. I think the prevailing view is that Stieglitz threw it out after making the picture.