Not all museums. Rijksmuseum[1], Finnish National Gallery via Europeana[2], Met Museum[3], National Museum Sweden[4], Minneapolis Institute of Art[5], The Walte

Not all museums. Rijksmuseum[1], Finnish National Gallery via Europeana[2], Met Museum[3], National Museum Sweden[4], Minneapolis Institute of Art[5], The Walters Art Museum[6], Art Institute of Chicago[7], Cleveland Museum of Art[8], Paris Musées[9], The Smithsonian[10], and Birmingham Museums[11] all have CC0 art available. [1] https://www.rijksmuseum.nl/en/search?q=&f=1&p=1&ps=12&type=painting&imgonly=True&st=Objects https://www.rijksmuseum.nl/en/search?q=&f=1&p=1&ps=12&type=p... [2] https://www.europeana.eu/portal/en/collections/art?f%5BDATA_PROVIDER%5D%5B%5D=Finnish+National+Gallery&f%5BREUSABILITY%5D%5B%5D=open&f%5BRIGHTS%5D%5B%5D=http%2A%3A%2F%2Fcreativecommons.org%2F%2Apublicdomain%2Fzero%2A&per_page=96&view=grid https://www.europeana.eu/portal/en/collections/art?f%5BDATA_... [3] https://www.metmuseum.org/art/collection/search#!/search?material=Paintings&showOnly=withImage%7Copenaccess&sortBy=Relevance&sortOrder=asc&perPage=20&offset=0&pageSize=0 https://www.metmuseum.org/art/collection/search#!/search?mat... [4] https://www.nationalmuseum.se/en/samlingarna/fria-bilder https://www.nationalmuseum.se/en/samlingarna/fria-bilder [5] https://collections.artsmia.org/ https://collections.artsmia.org/ [6] https://art.thewalters.org/ https://art.thewalters.org/ [7] https://www.artic.edu/collection?q=test&is_public_domain=1&department_ids=European+Painting+and+Sculpture https://www.artic.edu/collection?q=test&is_public_domain=1&d... [8] http://www.clevelandart.org/art/collection/search?only-open-access=1&filter-type=Painting http://www.clevelandart.org/art/collection/search?only-open-... [9] http://parismuseescollections.paris.fr/en/recherche/image-libre/true/avec-image/true/denominations/peinture-166168?mode=mosaique&solrsort=ds_created%20desc http://parismuseescollections.paris.fr/en/recherche/image-li... [10] https://www.si.edu/search/collection-images?edan_q=landscape&edan_fq[0]=object_type%3A%22Paintings%22 https://www.si.edu/search/collection-images?edan_q=landscape... [11] http://dams.birminghammuseums.org.uk/asset-bank/action/viewDefaultHome http://dams.birminghammuseums.org.uk/asset-bank/action/viewD...