Victor Servranckx, Composition, c. 1927, Pencil on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/37699

Pierre Theunis, Duc et Duchess de Brabant, 1926, bronze; 2 3/4 in. (6.9 cm.) diam., Smithsonian American Art Museum, Washington, D.C. https://dartabase.art/cite/smithsonian/ld1-1643381040022-1643381055260-0

Georges Vantongerloo, XY = K Green and Red, 1929, Gouache on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/35841

James Ensor, Mädchen mit Masken (Kommunion), 1921, Öl auf Leinwand, Städel Museum, Frankfurt am Main. https://dartabase.art/cite/staedel/3321