Bruce Nauman, Kassel Corridor: Elliptical Space (1972), installation view, &quot;Bruce Nauman: Disappearing Acts&quot; at the Museum of Modern Art, New York. Photo by Martin Seck, ©2018 the Museum of Modern Art, New York; courtesy of the Solomon R. Guggenheim Museum, New York, Panza Collection; ©2018 Bruce Nauman/Artists Rights Society (ARS), New York.