https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14014132
Bureau Général de l'Administration des Hospices de Paris: facade with lettered key. Line engraving by J.E. Thierry after H. Bessat, 1807.
Original public domain image from Wellcome Collection
Public DomainFree CC0 image for Personal and Business use