This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Oresme Spheres. Le livre du Ciel et du Monde Illustration of the Celestial spheres Note that although the order of the spheres is conventional with the Moon and Mercury closest the Earth and Saturn and the stars farthest the spheres are convex upward centered on God rather than convex downward centered on the Earth Paris BnF Manuscrits