Emmaüsgangers (1857 - 1927) by Gijsbertus Antonius Sluijters https://www.rawpixel.com/image/13763498/emmausgangers-1857-1927-gijsbertus-antonius-sluijtersFree Image from public domain licenseAnnual reunion of neurologists at the Salpêtrière hospital, 1926. Photograph, 1926. https://www.rawpixel.com/image/13983044/photo-image-person-sword-hospitalFree Image from public domain licenseFrederick Belding Power, Frau (Louise) Flückiger and Marie Flückiger. Photograph, 1897. https://www.rawpixel.com/image/13981575/photo-image-face-plant-peopleFree Image from public domain license