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).
Eugène-André Oudiné. Architecture Holding Statues of Personifications of Structure, Form, and Color (Medal for the Société centrale des architects) [obverse], designed 1843, awarded 1911. National Gallery of Art, Washington.