License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Anonymous, Italian, 16th to early 17th century. Trajan Fighting the Dacians; Trajan on horseback at right riding towards a group of soldiers at left and trampling two men, ca. 1515–1600. The Metropolitan Museum of Art.