License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Johann Georg Pintz. Design for a Cartouche and Representation of Sight, plate 2 from "Neu Inventierte auf die artigste Facon Sehr nutzliche Schild", printed ca. 1750–56. The Metropolitan Museum of Art.