Part I. Introduction to Alfred Rosenberg and his diary -- Part II. Alfred Rosenberg's diary 1934-1944 -- Part III. Related documents -- Part IV. A "final solution" in "the East": Rosenberg and the "Jewish question" -- Ideology applied: Rosenberg's antisemitism and the Nazi system -- New opportunities: "Operation Barbarossa" and the onset of genocide -- A European project: Rosenberg and the Holocaust -- From selective memory to lost record: the post-war fate of Rosenberg's diary notes.