License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Charles Pollock. [Group of 11 Stereograph Views of the 1869 and 1872 World Peace Jubilees, Boston, Massachusetts, United States of America], 1850s–1910s. The Metropolitan Museum of Art.