License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Stefano della Bella. A Turkish man with a beard and turban with one long feather in front, turned three-quarters to the right, from "Several heads in the Persian style" (Plusieurs têtes coiffées à la persienne), 1650. The Metropolitan Museum of Art.