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).
French 18th Century after Robert Benard and Louis-Jacques Goussier. Imprimerie en Taille Douce, Devéloppement de la Presse: pl. II, 1771/1779. National Gallery of Art, Washington.