Lee Ufan, Relatum (formerly Language), 1971/2011
Cushions, stones, and light, overall dimensions vary with installation

Installation view: Lee Ufan: Marking Infinity, Solomon R. Guggenheim Museum, New York, June 24–September 28, 2011
Photo: David Heald © Solomon R. Guggenheim Foundation, New York

Installation view: Lee Ufan: Marking Infinity, Solomon R. Guggenheim Museum, New York, June 24–September 28, 2011
Photo: David Heald © Solomon R. Guggenheim Foundation, New York

Installation view: Lee Ufan: Marking Infinity, Solomon R. Guggenheim Museum, New York, June 24–September 28, 2011
Photo: David Heald © Solomon R. Guggenheim Foundation, New York

Lee Ufan, Dialogue, 2009–11
Steel and stones, two steel plates, 200 x 1.5 x 40 cm each; two stones, approximately 70 cm high each

Installation view: Lee Ufan: Marking Infinity, Solomon R. Guggenheim Museum, New York, June 24–September 28, 2011
Photo: David Heald © Solomon R. Guggenheim Foundation, New York

Lee Ufan breaking the glass for Relatum (formerly Phenomena and Perception B) (1968/2011), during installation of Lee Ufan: Marking Infinity, Solomon R. Guggenheim Museum, New York
Photo: Kristopher McKay © Solomon R. Guggenheim Foundation, New York