License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Wilhelm Peter Zimmermann. How one entered the church (Folgt wie man zur Kirchen gangen), from a series depicting the wedding of Wolfgang Wilhelm, Duke of Pfalz-Neuberg, Pfalzgraf, and Magdalena, Duchess of Bavaria, in Munich, 1613 (Plate 4), 1614. The Metropolitan Museum of Art.