Lee Ufan: Marking Infinity Lee Ufan Relatum, 1978/1990 Steel and stones Two plates, 0.9 x 210 x 280 cm each; two stones, approximately 30 cm and 70 cm high The National Museum of Art, Osaka Installation view: Minimal Art, National Museum of Art, Osaka, October 6–November 25, 1990 Photo courtesy Lee Ufan