The Polish Małopolska’s Virtual Museums project has donated 1,000 high-quality 3D Scans of their collection to the Public Domain. Their scans are high-quality and clean, and since they're rights-free you can use them for your Blender projects without any restrictions.
Dedicating 3D models to the public domain makes historic artworks and artifacts available for re-use and remixing—even for commercial purposes—without any attribution or legal requirements. Public domain content allows contemporary creators and businesses alike to build new experiences upon themes and styles of artworks created hundreds, even thousands, of years ago.
The collections being dedicated to the public domain by the Małopolska’s Virtual Museums project are not only incredibly high-quality 3D scans and models, but they span a very broad range of subject matter. With 3D models of geology and fine art, of engineering, pharmacology, and more, you are bound to find something useful or interesting for your own creative work. How will you re-use this wealth of high-quality 3D models?!