An infected open wound on the outer thigh of a man suffering from creeping or serpiginous phagedena. Watercolour by C.… https://www.rawpixel.com/image/13996820/image-person-art-watercolourFree Image from public domain licenseSection of a testicle removed from a man suffering from tertiary syphilis. Watercolour by C. D'Alton, 1858. https://www.rawpixel.com/image/13971275/image-art-watercolour-manFree Image from public domain licenseBlad met twee vignetten (1700) by Dirk Janszoon van Santen, Jan Luyken and Pieter Mortier I https://www.rawpixel.com/image/13780211/image-paper-face-frameFree Image from public domain licenseSores and pustules on the hand and arms of a woman suffering from secondary syphilis. Watercolour by C. D'Alton, 1858. https://www.rawpixel.com/image/14014150/image-hand-person-artFree Image from public domain license