https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13965346
Two Chinese prisoners carrying heavy loads on poles balanced on their shoulders: the men have their legs shackled and are led by two other men, who hold the long chains attached to the prisoners' necks. Gouache painting on rice-paper, 1780/1880.
Original public domain image from Wellcome Collection
Public DomainFree CC0 image for Personal and Business use