License, verbatimPD
The National Gallery of Art: open access image with no usage restrictions under the NGA's open access policy (openaccess=1 in the Gallery's published_images dataset).
Adolphe Terris. Sculpture de griffon sur un chantier à Marseille (Sculpture of a Griffin on a construction site in Marseille), c. 1866-1868. National Gallery of Art, Washington.