https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13974132![Jean le Rond d'Alembert. Line engraving [by Wicanrus], 1789, after A. Pujos.](https://images.rawpixel.com/image_social_portrait/cHJpdmF0ZS9sci9pbWFnZXMvd2Vic2l0ZS8yMDI0LTAyL2xyL3djYjV6Y2M3NzMtaW1hZ2UuanBn.jpg)
Jean le Rond d'Alembert. Line engraving [by Wicanrus], 1789, after A. Pujos.
Original public domain image from Wellcome Collection
Public DomainFree CC0 image for Personal and Business use