To investigate and estimate Nazi plunder in the USSR during 1941 through 1945, the Soviet State Extraordinary Commission for Ascertaining and Investigating the Crimes Committed by the German-Fascist Invaders and Their Accomplices was formed on 2 November 1942. During the Great Patriotic War and afterwards, until 1991, the Commission collected materials on Nazi crimes in the USSR, including incidents of plunder. Immediately following the war, the Commission outlined damage in detail to sixty-four of the most valuable Soviet museums, out of 427 damaged ones. In the Russian SFSR, 173 museums were found to have been plundered by the Nazis, with looted items numbering in the hundreds of thousands.