Tuskulėnai Manor had been nationalised in 1940 and was later used as KGB officers' apartments and as a kindergarten. During excavations that took place between 1994 and 1996 in its territory, the remains of 706 bodies were found; 40 were identified. The area had been used to hide the bodies of Lithuanian residents – mostly resistance fighters against the Soviet occupation and Nazi collaborators – who had been executed by the NKGB and MGB in the Vilnius' KGB Palace between 1944 and 1947 but also those who died fighting Polish Armia Krajowa soldiers. The remains from the mass grave were placed in a columbarium built underground, beneath an artificial hill, and consecrated in 2004.