” What is it then that distinguishes the offer of art ‘Fountain’ from the functional product urinal? Visible changes that were carried out by Duchamp and appear as material language, are the signature (R. Mutt 1917), the presentation (the backside lying on a pedestal – compare with the historical photo by Stieglitz for the journal 391), the place of presentation (not a sanitation shop-window, not a washroom – but an exhibition, museum – compare to a picture of Marcel Duchamp where he sits in front of the object in the Pasadena Art Museum, Los Angeles 1963), the giving of the title as information about the context.”