Pierre Alechinsky, Poem, 1960, Etching, Whitney Museum of American Art, New York. https://dartabase.art/cite/whitney/96.198.1

James Ensor, L'Orgueil (Pride), 1904, Etching, hand-coloured on thick smooth yellowed wove paper (simili Japan), Queensland Art Gallery and Gallery of Modern Art, Brisbane. https://dartabase.art/cite/qagoma/11320

Florent Willems, The Health of the King, c. 1861, oil on panel (mahogany), Walters Art Museum, Baltimore. https://dartabase.art/cite/walters/37.50

František Kupka, Composition géométrique (Geometric composition), c.1909–11, Gouache on paper, Queensland Art Gallery and Gallery of Modern Art, Brisbane. https://dartabase.art/cite/qagoma/65734