Hey there. I thought this could be a place for sharing CC0/Public Domain sources for collages. I know there are sites like unsplash or pixels, but I red about cases where people upload images there, that are copyrighted by another people (and about groups that do this on purpose to make money). For this reason, I often look for CC0/public domain images/photos that are offered by museums or single artists/photographers which share them on their websites. So here is what I found - I hope you find it useful and add more:

1.) Websites with CC0 illustrations by Pablo Stanley: https://www.transhumans.xyz/about https://www.openpeeps.com/ https://www.humaaans.com/

2.) Webite with CC0 illustrations by Katerina Limpitsouni: https://undraw.co/

3.) Website with CC0 illustrations by Vijay Verma: https://illlustrations.co

4.) Websites from museums and similar stuff (you have to set filters to find PD stuff):

https://www.mkg-hamburg.de/sammlung/online?

https://www.europeana.eu/en

https://www.metmuseum.org/about-the-met/policies-and-documents/open-access

https://collections.britishart.yale.edu/catalog/

https://www.loc.gov/free-to-use/

https://www.flickr.com/commons

5.) Raxpixel.com (has collections with public domain stuff - for example paintings by the artist Paul Klee)

6.) Website with CC0 photos by Markus Spiske (Note that the photos doesn't have a model or property release): https://ffcu.io/

7.) Website with free photos by Ryan McGuire (Note that there is many AI stuff too and I'm not sure if the photos have a model release AND read the license page): https://gratisography.com/license/

8.) Website with free photos by Karolina Grabowska (There is a model release, but read the license page for allowed uses): https://kaboompics.com/page/terms-of-use

I've made a few digital collages with an android app called Dada, that has pre-loaded 'scraps' and pictures. I've also been making analog collages for years. I'm interested in maybe selling prints of my digital collages (made with something other than Dada, probably GIMP or Photopea). I've found some public domain art, but they're mostly JPG. Where do you all find commercial use art for your collages for a decent price (or free, if that exists). I've searched on google but most of what I'm finding isn't what I'm looking for.