
Fountain is a 1917 work produced by Marcel Duchamp. The piece was a porcelain urinal, which was signed «R.Mutt» and titled Fountain. Submitted for the exhibition of the Society of Independent Artists, in 1917, the first annual exhibition by the Society to be staged at The Grand Central Palace in New York, Fountain was rejected by the committee, even though the rules stated that all works would be accepted from artists who paid the fee. Fountain was displayed and photographed at Alfred Stieglitz’s studio, and the photo published in The Blind Man, but the original has been lost. The work is regarded by art historians and theorists of the avant-garde, such as Peter Bürger, as a major landmark in 20th-century art. 17 replicas commissioned by Duchamp in the 1960s now exist.(CC-BY-SA Wikipedia)
Download (kein Original) | Marcel Duchamp

Von Duchamp autorisierte Repliken in unterschiedlichen Ausführungen finden sich weltweit in den Sammlungen namhafter Museen.
Sherrie Levine, Fountain (Buddah), 1996 – a cheeky remix http://www.thingiverse.com/thing:571460
https://youtu.be/OUJVxCwyh9w
«geblieben ist uns die grosse Walnuss, das Porzelan wurde dem Handel entzogen, dies wanderte auf den Chachelimärt.»
The Projekt BigDada offers the possibility to get a connected readymade. 3d printers print the fountain in the Cabaret Voltaire and everybody can win one.

Discussion if the fountain is in the public domain or not.
http://republicdomain.net/blog/2016/02/27/duchamp-fountain-urheberrechte/
Story about the «Pissing on Fountain» idea: http://www.3ammagazine.com/3am/pissing-in-duchamps-fountain/
Successful try
(Björn Kjelltoft pisses in an authorised copy of Fountain in Stockholm 2011)
The fountain as a spoon on thingyverse by Emily Bright.
Tom Burton Wood published the Fountain as 3D Object on Thingyerse. Everybody now can use and re-use the fountain.
. The object on thingyverse.
The Fountain as a Candy Dispenser produced by Tom Burton Wood.