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

Itur-ili, Tablet Recording a Business Letter, c. 1840–1730 BCE (Assyrian Colony), clay, hand made; impressed, Walters Art Museum, Baltimore. https://dartabase.art/cite/walters/48.1462