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).
Camille Pissarro. Wooded Landscape at L'Hermitage, Pontoise (Paysage sous bois, a L'Hermitage, Pontoise), 1879. National Gallery of Art, Washington.