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).
Jean-Baptiste-Camille Corot. In the Dunes: Souvenir of The Hague (Dans les dunes: Souvenir du bois de La Haye), 1869. National Gallery of Art, Washington.