Horwitz, Channa. Four Levels Composition #1, 1974–1980. Pen and ink on plastic film, Sheet: 42 1/4 × 109 3/4in. (107.3 × 278.8 cm). Whitney Museum of American Art, New York; gift of the Channa Horwitz Art Trust, 2018.262. (Photo: Whitney Museum of American Art)