License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Thomas Sully. Doric Rotunda Interior with Curtains; Four Figure Studies, Including a Female Nude Bather with Putti, and a Martyrdom [of St. Bartholomew?] (from Sketchbook), 1810–20. The Metropolitan Museum of Art.