Robert Rauschenberg, Canyon, 1959. Oil, pencil, paper, metal, photograph, fabric, wood, canvas, buttons, mirror, taxidermied eagle, cardboard, pillow, paint tube, and other materials. 81-3/4 x 70 x 24 in. The Museum of Modern Art, New York. Gift of the family of Ileana Sonnabend. © 2013 Robert Rauschenberg Foundation/Licensed by VAGA, New York, NY

Andy Warhol, Ileana Sonnabend, 1973. Acrylic and silkscreen on canvas, two panels. 40 x 80 in. Sonnabend Collection, New York. © 2013 Andy Warhol Foundation for the Visual Arts / Artists Rights Society (ARS), New York

Roy Lichtenstein, Little Aloha, 1962. Acrylic on canvas. 44-1/16 x 42-1/8 in. Sonnabend Collection, New York. © Estate of Roy Lichtenstein

Jeff Koons, Pink Panther, 1988. Porcelain on Formica base. 41 x 20-1/2 x 19 in. The Museum of Modern Art, New York. Gift of Werner and Elaine Dannheisser © 2013 Jeff Koons

Hiroshi Sugimoto, Hyena-Jackal-Vulture, 1976. Gelatin silver print. 20 × 24 in. © Hiroshi Sugimoto

Larry Bell, Shadows, 1967. Partially silvered glass with chromium frame. 14-1/4 x 14-1/4 x 14-1/4 in. The Museum of Modern Art, New York. Gift of the artist (by exchange) © 2013 Larry Bell

James Rosenquist, Volunteer, 1963-64. Oil on canvas. 72 x 78 in. The Art Institute of Chicago. Through prior acquisitions of Mary and Leigh Block, Samuel P. Avery Endowment, and Mr. and Mrs. Carter H. Harrison; Robert and Marlene Baumgarten Fund; estate of Solomon Byron Smith; Constance Obright and Samuel and Sarah Deson Memorial funds. Art © James Rosenquist/Licensed by VAGA, New York, NY

Bruce Nauman, Silver Livres, 1974. Neon tubing with clear glass tubing suspension frame. 11-7/8 × 19-9/16 × 2-3/4 in. Collection Ealan and Melinda Wingate © 2013 Bruce Nauman / Artists Rights Society (ARS), New York

Terry Winters, Schema (57), 1985-86. Graphite and watercolor on paper. 12-1/8 × 8-5/8 in. © Terry Winters, Courtesy of Matthew Marks Gallery

Ileana Sonnabend at her desk at Galerie Ileana Sonnabend, Paris, circa 1965. Courtesy Sonnabend Gallery, New York