Michelangelo Buonarroti, Study for the Nude Youth over the Prophet Daniel (recto); Figure Studies for the Sistine Ceiling (verso), 1510–11, red chalk over black chalk or charcoal, Cleveland Museum of Art, Cleveland. https://dartabase.art/cite/cleveland/119614

Edgar Degas, Sheet of Studies and Sketches, 1858, graphite, pen and dark brown ink, and watercolor on thick ivory wove paper, Cleveland Museum of Art, Cleveland. https://dartabase.art/cite/cleveland/128808

Odilon Redon, Melancholy, c. 1868, graphite on beige wove paper, Cleveland Museum of Art, Cleveland. https://dartabase.art/cite/cleveland/109138