License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Abu'l Qasim Firdausi. "The Angel Surush Rescues Khusrau Parviz from a Cul-de-sac", Folio 708v from the Shahnama (Book of Kings) of Shah Tahmasp, ca. 1530–35. The Metropolitan Museum of Art.