Soviet documentation from before the occupation of Vitebsk, 1939-1941, and State Extraordinary Commission for Investigation of Nazi War Crimes in the Soviet Union (ChGK) documentation from 1944 In the Collection there is a list of the Communists in Vitebsk, 1940-1941; a report submitted by the head of the Party Committee in Polotsk to the director of the Belorussian History Museum regarding the extermination of the Jews in Polotsk; a report from the Notarization Committee of the Municipal Party Conference in Vitebsk; a list of factory and organization managers in Vitebsk, prepared in 1941; and a ChGK investigative committee [report] concerning the murder of Jews in the city of Lepel.