
Keith Sonnier, Untitled, n.d.. Polyurethane foam, aluminum screen, paint, fabric, and tape, overall: 2 1/2 × 21 × 1 in. (6.4 × 53.3 × 2.5 cm). Whitney Museum of American Art, New York; gift of the Estate of Robert Smithson 2006.333. © Keith Sonnier / Artists Rights Society (ARS), New York