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

Rembrandt van Rijn, Tobias Healing His Father's Blindness, c. 1640–45, Pen and brown ink, touched with white gouache; framing lines in pen and brown ink, Cleveland Museum of Art, Cleveland. https://dartabase.art/cite/cleveland/144844

Fra Bartolommeo, Farmhouse on the Slope of a Hill, c. 1508, pen and brown ink, Cleveland Museum of Art, Cleveland. https://dartabase.art/cite/cleveland/134951

Pietro Perugino, Saint Sebastian, c. 1493, metalpoint, Cleveland Museum of Art, Cleveland. https://dartabase.art/cite/cleveland/135407

Raphael, Studies of a Seated Female, Child's Head, and Three Studies of a Baby, c. 1507–8, metalpoint, Cleveland Museum of Art, Cleveland. https://dartabase.art/cite/cleveland/149377