František Kupka, [Untitled], 1928, Gouache, watercolor, and pencil on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/38252

Caspar David Friedrich, Gebirge bei aufsteigendem Nebel, c. 1835, Öl auf Leinwand, Städel Museum, Frankfurt am Main. https://dartabase.art/cite/staedel/1806

Öyvind Fahlström, Notes 4 (C. I. A. Brand Bananas), 1970, Synthetic polymer paint and ink on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/36861

František Kupka, Admiration, c. 1899, Gouache, charcoal, watercolor, crayon, and pastel on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/33684

Öyvind Fahlström, Plan for World Trade Monopoly, 1970, Cut-and-pasted paper with synthetic polymer paint, ink, and colored pencil on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/36864

František Kupka, Replica of Fugue in Two Colors: Amorpha, 1912, (1946), Gouache, ink, and pencil on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/34761

Carl Fredrik von Breda, Mrs. William Hartigan, 1787/1796, oil on canvas, National Gallery of Art, Washington. https://dartabase.art/cite/nga/1109

František Kupka, Replica (1946) of Vertical Planes, (1946), Watercolor, gouache, and pencil on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/34788

František Kupka, View from a Carriage Window, c. 1901, Gouache and watercolor on paper with cardboard overlay, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/34108

František Kupka, [Untitled], c. 1925–30, Colored pencil, pencil, ink, and oil on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/38250

František Kupka, Study with Green, (c. 1912), Chalk and gouache on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/38151

František Kupka, Prometheus, (1909), Gouache, watercolor, ink, and pencil on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/36018