License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Anonymous, French, 16th century. St. Peter's, cornice and architrave, profile; key, elevation; triglyph and guttae, elevation and section (recto) blank (verso), early to mid-16th century. The Metropolitan Museum of Art.