Public Work archive

Archive of public domain imagery.

https://public.work/

No permission is needed to copy or use public domain works. A work is generally considered to be within the public domain if it is ineligible for copyright protection or its copyright has expired.

Public domain works can serve as the foundation for new creative works and can be quoted extensively. They can also be copied and distributed to classes or placed on course web pages without permission or paying royalties. 

https://copyright.universityofcalifornia.edu/use/public-domain.html#:~:text=A%20work%20is%20generally%20considered,and%20can%20be%20quoted%20extensively.