This paper is about the history of the Photographic Archives of the Center of the Humanities and Social Sciences, in the CSIC, from its origins as the Center for Historical Studies to nowadays, brought about the unification of the institutes forming the CCHS and the convergence of different databases. We aim to highlight the value of photography as an information source for the Humanities and Social Sciences, and give a reflection of the History of Photography as well as of various photographic processes, becoming also a cultural and scientific heritage