sailing boats at a dock at right and on shore at left in a city, with buildings in background; sepia toned, mottled brown on… https://www.rawpixel.com/image/7653165/photo-image-background-vintage-artFree Image from public domain licenseLunch in honour of Albert Einstein, with (front row) Paul Langevin, Einstein, Comtesse de Noailles, Paul Painlevé.… https://www.rawpixel.com/image/13996459/photo-image-people-art-clothingFree Image from public domain license