Case photograph is a term sometimes used to describe three types of photographs of the nineteenth century, which generally were kept in decorative or protective cases. They are the daguerreotype, named after its inventor L.J.M. Daguerre; the ambrotype; and the tintype or ferrotype. Daguerreotypes were introduced in 1839 in Paris, France, constituting for some photo-historians the beginning of photography. Ambrotypes and tintypes, made by the wet collodion process, originated in the 1850s.