“We are living in a specially remarkable period. We find to our astonishment that progress has allied itself with barbarism,” wrote Freud in 1938. Should we not add “with silence,” if we note that, from 1945 to 1985, a virtual silence descended on Germany about the Nazi era? How did an entire nation manage to obliterate the history of such a disaster almost immediately? Repression, denial, splitting, “cold amnesia,” “autistic attitude,” trauma, manic reconstruction: the author attempts to identify the characteristics of this process of “derealization” that made it possible to “leave the past in the past,”, until the historians' dispute (Historikerstreit) reconflictualized the psychic space of the German community. Shouldn't the exploration of the future of this silence enlighten psychoanalysts on the content of mass delirium?