Dada Movement - Marcel Duchamp - 'Fountain' 1917
The idea of readymades such as Fountain were that it did not matter whether or not an article was made by an artist, it was the intellectual decision taken by the artist to place it in a gallery and call it art that made it art. It meant that anything could be art. This represented a movement away from the idea of physical creation and craftsmanship to one of intellectual interpretation.
Some of the leading artists of the Dadaism art movement were Marcel Duchamp, George Grosz, Otto Dix, Hans Richter and Jean Arp.