Only after the German invasion of the Soviet Union in 1941 did Joseph Stalin finally start to scale back the anti-religious campaign, needing the moral support of the Church during the war. In the early hours of September 5, 1943, Stalin met with the three chief hierarchs of the Russian Orthodox Church and promised some concessions to religion in exchange for their loyalty and assistance. Among the concessions were the permission to open the Moscow Theological Seminary and Academy, the release of imprisoned clerics, the return of some church property, including the famous Troitse-Sergiyeva Lavra. In return, the Soviet government put the Church under the control of its secret services.