License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Philip Henry Delamotte. [Medieval Court; Statue of Coleoni; Equestrian Statue of Gattamelata by Donatello, from the Court of Monuments of Christian Art; Equestrian Statue of Colleone], ca. 1859. The Metropolitan Museum of Art.