https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13966722![Glass: a mediaeval glass-maker at work beside his furnace. Coloured pencil drawing, [n.d., twentieth century], after a…](https://images.rawpixel.com/image_social_landscape/cHJpdmF0ZS9sci9pbWFnZXMvd2Vic2l0ZS8yMDI0LTAyL2xyL3djdXV1Z3BzYzctaW1hZ2UuanBn.jpg)
Glass: a mediaeval glass-maker at work beside his furnace. Coloured pencil drawing, [n.d., twentieth century], after a thirteenth century French manuscript illustration.
Original public domain image from Wellcome Collection
Public DomainFree CC0 image for Personal and Business use