Claude Bernard and his pupils. Oil painting after Léon-Augustin Lhermitte. https://www.rawpixel.com/image/13958551/claude-bernard-and-his-pupils-oil-painting-after-leon-augustin-lhermitteFree Image from public domain licenseClaude Bernard and his pupils. Oil painting after Léon-Augustin Lhermitte. https://www.rawpixel.com/image/13959484/claude-bernard-and-his-pupils-oil-painting-after-leon-augustin-lhermitteFree Image from public domain licenseBritish inventors, politicians and military men, gathered in a room at Buckingham Palace. Engraving by C.G. Lewis, 1863… https://www.rawpixel.com/image/13986687/image-cat-person-artFree Image from public domain licenseBritish inventors, politicians and military men: a key to the identities of the sitters. Engraving by C.G. Lewis, 1863… https://www.rawpixel.com/image/13997233/image-dog-paper-cartoonFree Image from public domain licenseSchool of Medicine, Paris: a mural in the amphitheatre showing fifty-six prominent medical men in a neo-classical setting.… https://www.rawpixel.com/image/14021737/image-paper-cartoon-peopleFree Image from public domain license