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. Portico at the Porta Carmentalis, Tuscan capital and entablature, elevation; pier, section, detail (recto) S. Prassede, Quadriportico, Doric capital, elevation; Palazzo Massimo alle Colonne, column shaft, profile (verso), early to mid-16th century. The Metropolitan Museum of Art.