License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Parri Spinelli. Free Copy of Giotto's "Navicella" (recto); Copy of Adam in Masaccio's "Expulsion from the Garden of Eden", and other Figure Studies (verso), ca. 1420. The Metropolitan Museum of Art.