Marcel Duchamp the Broken Arm", followed soon after. His "Fountain", a urinal signed with the pseudonym "R. Mutt", shocked the art world in 1917. "Fountain" was selected in 2004 as "the most influential artwork of the 20th century" by 500 renowned artists and historians. In 1919, Duchamp made a parody of the "Mona Lisa" by adorning a cheap reproduction of the painting with a mustache and goatee. To this he added the inscription "L.H.O.O.Q.", a phonetic game which, when read out loud in French quickly sounds like ""Elle a chaud au cul"". This can be translated as "She has a hot ass,"
Fountain (Duchamp) attack was a work of performance art that Marcel Duchamp himself would have appreciated. In 1993 Pinoncelli urinated into the piece while it was on display in Nimes, in southern France. Both of Pinoncelli's performances derive from neo-Dadaists' and Viennese Actionists' intervention or manoeuvre. From the 1950s, Duchamp's influence on American artists had grown exponentially. Life magazine referred to him as "perhaps the world's most eminent Dadaist", Dada's "spiritual leader", "Dada's Daddy" in a lengthy article published 28 April 1952. By the mid-50s his readymades were present in permanent collections of American museums. In 1961, Duchamp wrote a letter to