https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13978131
Moses points to the brazen serpent while his people writhe on the ground, besieged by fiery serpents. Etching by G. Cooke, 1816, after C. le Brun.
Original public domain image from Wellcome Collection
Public DomainFree CC0 image for Personal and Business use