"In Memory of Escher"(Click to enlarge)

This photo, by Swiss photographer Martin Zurmuehle, contains references to both the Marcel Duchamp cubist painting Nude Descending a Staircase. No. 2 and M. C. Escher’s optical illusion work Ascending and Descending.

Nude Descending a Staircase. No. 2
Marcel Duchamp (1912)

Detail of M. C. Escher’s  "Ascending and Descending" (1960)

– See this Deceptology entry on M. C. Escher: M. C. Escher in Legos – Ascending and Descending>>– "In Memory of Escher" photo is from Photoforum, an online Russian photo gallery>>