https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13994381![Ludwig Julius Kaspar Mende. Stipple engraving by H. Lödel after [G. M.].](https://images.rawpixel.com/image_social_portrait/cHJpdmF0ZS9sci9pbWFnZXMvd2Vic2l0ZS8yMDI0LTAyL2xyL3djbWRjdmY2bXItaW1hZ2UuanBn.jpg)
Ludwig Julius Kaspar Mende. Stipple engraving by H. Lödel after [G. M.].
Original public domain image from Wellcome Collection
Public DomainFree CC0 image for Personal and Business use