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. "Zal Questions Sam's Intentions Regarding the House of Mihrab", Folio 81v from the Shahnama (Book of Kings) of Shah Tahmasp, ca. 1525–30. The Metropolitan Museum of Art.