Gabriel, (still), Agnes Martin, 1976.

Agnes Martin, Galleries, 1961. © 2014 Agnes Martin / Artists Rights Society (ARS), New York

Agnes Martin, Untitled #1, 1989, acrylic and graphite on linen, 72″ x 72″ (182.9 cm x 182.9 cm). Photo by: G. R. Christmas / Courtesy The Pace Gallery.