License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Lambert Suavius. Cross-Section of Round Temple [Pinaculu Termar], from "Ruinarum variarum fabricarum delineationes pictoribus caeterisque id genus artificibus multum utiles", 1554. The Metropolitan Museum of Art.