Peter Fischli David Weiss, Untitled, 1994–2013 (detail), Painted polyurethane, 164 parts, overall dimensions vary with installation Solomon R. Guggenheim Museum, New York, Purchased with funds contributed by the Collections Council and through prior gifts of an anonymous donor, Mr. and Mrs. Nathan L. Halpern, and the Andrew Powie Fuller and Geraldine Spreckels Fuller Bequest 2014.115 © Peter Fischli and David Weiss. Photo: Jason Klimatsas