License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Orazio Scarabelli. Naumachia in the Court of Palazzo Pitti, from an Album with Plates documenting the Festivities of the 1589 Wedding of Arch Duke Ferdinand I de’ Medici and Christine of Lorraine, 1589–92. The Metropolitan Museum of Art.