In 1996, The Mauthausen Survivors’ Association and those groups representing survivors of other concentration camps in Spain deposited part of their historical collections in the Museu d’Història de Catalunya. Amongst said funds was a collection of negatives which came from the Nazi concentration camps of Mauthausen and Gusen (Austria). Part of this photographic collection, made between 1940 and 1945, was taken by the Nazis of the Erkennungsdienst (Identification Department) of the Mauthausen camp. This department, overseen by the Gestapo, was in charge of, among other tasks, the documentation of the entry and exit records of those deported and of the operation and life in the camp. The remaining negatives corresponded to a report on the liberation of the Mauthausen camp (1945), taken by the Catalonian photographer Francesc Boix, who was up until then a prisoner in the camp and a forced worker of the Identification Department. The "Mauthausen, The Graphic Chronicle" exhibition presents a selection of these photographs, some of which were used as testimony in the Nuremberg Trials in 1946.