A person walks past Duchamp's Fountain, in the Tate Modern, London, which is part of the gallery's Duchamp, Man Ray and Picaba exhibition which runs from February 21 to May 26, 2008. (Photo by Tim Ireland - PA Images/PA Images via Getty Images)
A person walks past Duchamp's Fountain, in the Tate Modern, London, which is part of the gallery's Duchamp, Man Ray and Picaba exhibition which runs from February 21 to May 26, 2008. (Photo by Tim Ireland - PA Images/PA Images via Getty Images)