Simply ordinary objects modified in strange way were the basis of, for 10 points, what works of "retinal art" created by Marcel Duchamp.
Examples of these include ones titled Pulled at 4 pins and 50 cc of Paris Air, which actually contained air from Paris brought to New York. One is a snow shovel with the title In advance of the broken arm painted onto it, and another is a bicycle wheel mounted by its fork on a painted stool. More famous examples of these works of art include a postcard of the Mona Lisa with a goatee and moustache painted on titled L.H.O.O.Q. and a porcelain urinal with the inscription "R. Mutt" titled Fountain. Simply ordinary objects modified in strange way were the basis of, for 10 points, what works of "retinal art" created by Marcel Duchamp.
Examples of these include ones titled Pulled at 4 pins and 50 cc of Paris Air, which actually contained air from Paris brought to New York.
{readymades} of Marcel Duchamp (prompt on less specific answers like “works by Marcel Duchamp”)