1887-1968. US artist, born in France. He achieved notoriety with his Nude Descending a Staircase 1912 (Philadelphia Museum of Art), influenced by Cubism and Futurism. An active exponent of Dadaism, he invented `ready-mades', everyday items like a bicycle wheel on a kitchen stool, which he displayed as works of art. A major early work that focuses on mechanical objects endowed with mysterious significance is La Mariee mise a nu par ses celibataires, meme/The Bride Stripped Bare by Her Bachelors, Even 1915-23 (Philadelphia Museum of Art). Duchamp continued to experiment with collage, mechanical imagery, and abstract sculpture throughout his career. He lived mostly in New York and became a US citizen in 1954.