Marcel Duchamp. Nude Descending a Staircase, No. 2 (1912). Oil on canvas. 57 7/8" x 35 1/8". Philadelphia Museum of Art.

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"His [David Galenson] statistical approach has led to what he says is a radically new interpretation of 20th-century art, one he is certain art historians will hate. It is based in part on how frequently an illustration of a work appears in textbooks.

'Demoiselles' came in at No. 1 with 28 illustrations....Marcel Duchamp's 1917 'Fountain' — a white urinal — was seventh with 18 illustrations, and his 1912 painting 'Nude Descending a Staircase, No. 2' was eighth with 16."