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. "Buzurjmihr Masters the Hindu Game of Chess", Folio 639v from the Shahnama (Book of Kings) of Shah Tahmasp, ca. 1530–35. The Metropolitan Museum of Art.