Walter Grundmann (21 October 1906, in Chemnitz – 30 August 1976, in Eisenach) was a German Protestant theologian and antisemitic Nazi and Stasi collaborateur during the Third Reich and GDR. Grundmann served both German dictatorships. He was a member of the Nazi party from 1930 onwards, and from 1933 onwards an active member of the German Christians and prospered as a state-antisemitism supporting theologian and professor for ethnic theology. In 1939, he was made head of the newly founded Instituts zur Erforschung jüdischen Einflusses auf das deutsche kirchliche Leben in Jena, which was meant to serve state antisemitism by the "Entjudung" (dejudifying) of the Bible and giving antisemitic theological training and arguments for Nazi propaganda. Despite his past Nazi activities, Grundmann regained some prestige as an evangelic theologian in East Germany; in 1959 he published his comments on the Gospels, which by the 1980s had become standard popular literature. However, Grundmann also prospered as a "Secret Informer" ("Geheimer Informator") to the Ministry for State Security ("Stasi"). He spied on (high ranking) theologians in Eastern and Western Germany. His cover name was GM Berg ("GM Mountain") after the Sermon on the Mount ("Bergrede") to which he referred in his inaugural speech^[1] 1939 at the Institute for the Study and Elimination of Jewish Influence on German Church Life, set up under him in Jena.^[2]