Christo, Valley Curtain, Project for Colorado, Grand Hogback, collage 1971,
wax crayon, graphite, Photostat by Harry Shunk, fabric, two diazo prints, enamel paint,
colored pencil, tape, and staples, mounted on paperboard, 70.7 x 55.9 (27 13/16 x 22).
National Gallery of Art, Washington, The Dorothy and Herbert Vogel Collection, Ailsa Mellon Bruce Fund,
Patrons' Permanent Fund, and Gift of Dorothy and Herbert Vogel 1992.7.1
© Christo 1971