Christo Valley Curtain (Project for Colorado) Collage 1971 Pencil, fabric, wax crayon, hand-drawn technical data, fabric sample, tape and staples 28 x 22″ (71 x 56 cm) Photo: Shunk-Kender © 1971 Christo

Christo Valley Curtain (Project for Colorado) Collage 1971 Pencil, fabric, wax crayon, hand-drawn technical data, fabric sample, tape and staples 28 x 22" (71 x 56 cm) Photo: Shunk-Kender © 1971 Christo