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. "Isfandiyar's Sixth Course: He Comes Through the Snow", Folio 438r from the Shahnama (Book of Kings) of Shah Tahmasp, ca. 1525–30. The Metropolitan Museum of Art.