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 cartouche with a sundial, a skull with feathers on its head at top, from "Eight Emblems for the Funeral of Francesco de Medici" (Huit emblèmes pour les funérailles du prince François de Médicis), ca. 1640–60. The Metropolitan Museum of Art.