License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
William Blake. The Last Trumpet (recto); Two studies of a right eye, a profile of an open-mouthed young man, the head of an eagle, and the head of a lion (verso), 1780–85. The Metropolitan Museum of Art.