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Reinhard Tristan Eugen Heydrich ( HY-drik; ; 7 March 1904 – 4 June 1942) was a high-ranking German SS and police official during the Nazi era and a principal architect of the Holocaust. Heydrich was chief of the Reich Security Main Office (including the Gestapo, Kripo, and SD). He was also Stellvertretender Reichsprotektor (Deputy/Acting Reich-Protector) of Bohemia and Moravia. Wikipedia