In front of the horror of the concentration camps, it would be necessary to wonder not only how it was possible to commit similar atrocious crimes against human beings, but above all it would be necessary to understand on which legal basis this could have happened. What happened in the camps cannot be read applying the classical juridical classification, because of the nature of the concentration camp, that looks as a hybrid of juridical and factual elements, a place where it is difficult to distinguish between quaestio facti and quaestio iuris and where every question about its legality has no sense. The aim of this paper is to explain  the juridical and political devices which are the source of the camp paradigm  and the basis of several Italian anti-migration laws, in particular paying attention to the CIE structure and eventual gender discrimination in the camp.