Fountain is one of Duchamp's most famous works and is widely seen as an icon of twentieth-century art. The original, which is now lost, consisted of a standard urinal, laid flat on its back rather than upright in its usual position, and signed 'R. Mutt 1917'. The Tate's work is a 1964 replica and is made from glazed earthenware painted to resemble the original porcelain. The signature is reproduced in black paint. Fountain is an example of what Duchamp called a 'readymade', an ordinary manufactured object designated by the artist as a work of art. It epitomises the assault on convention and good taste for which he and the Dada movement are best known.