The R. Mutt Sticker pays tribute to Marcel Duchamp, who challenged people to ask themselves “What is art?”. In 1917 Marcel Duchamp signed a urinal “R Mutt” and declared it art. Titled ‘The Fountain’, it is one of the pieces which he called readymades (also known as found art), because he made use of an already existing object. The art show to which Duchamp submitted the piece stated that all works would be accepted, but Fountain was not actually displayed, and the original has been lost. The work is regarded by some as a major landmark in 20th century art. Replicas commissioned by Duchamp in the 1960s are now on display in a number of different museums.