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).
Giuseppe Vasi, after Paolo Posi. The Seconda Macchina for the Chinea of 1752: The Banquet of the Gods in Villa Carl'Amalia in Caserta, 1752. National Gallery of Art, Washington.