License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Jacques Callot. Les Sept Bienheureux Dormants (The Seven Blessed Sleepers), July 27th, from "Les Images De Tous Les Saincts et Saintes de L'Année" (Images of All of the Saints and Religious Events of the Year), 1636. The Metropolitan Museum of Art.