License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Cornelis Bos. Series of Cartouches, in: Targhe ed altri ornati di varie e capricciose invenzioni (Cartouches and other ornaments of various and capricious invention, page 52), ca. 1545–60. The Metropolitan Museum of Art.