This is a compendium of Celluloid Photo Medallions, also known as "Photographic Buttons", "Mourning Photo Medallions" , "Art-Floral Medallions", "Panel Portraits", "Celluloid Button Photos", and/or "Plaques" of various types. They were quite popular from just before the turn of the twentieth century up through the Second World War. People would commission them, utilizing photographs of their loved ones, either alive or departed, themselves, beloved...