License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Perugino (Pietro di Cristoforo Vannucci). Two Studies of a Standing Youth in Quattrocento Clothing (recto); a cardinal's hat on a fragmentary coat of arms with a griffin (the arms of the city of Perugia) (verso), ca. 1504. The Metropolitan Museum of Art.