https://www.nypl.org/research/collections/digital-collections/public-domain Rights Information: https://digitalcollections.nypl.org/about The New York Public Library has a collection of over 300,000 items in its digital collection that have no known copyright restrictions…
https://www.getty.edu/museum/ Rights Information: https://www.getty.edu/legal/copyright.html The J. Paul Getty Museum has 150,564 digitized images in its Open Content collection. These images are in the public domain…