Robert Delaunay, Portrait of Iliazd, 1922, Charcoal on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/36082

Robert Delaunay, The Tower, 1911, dated 1910, Ink and pencil on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/35446

Robert Delaunay, The Tower and the Wheel, c. 1912–13, Ink on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/35439

Sonia Delaunay, Miss Mouth and Mr. Eye. Costume design for the play Le Coeur à Gaz, 1923, Ink and pencil on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/33382