Exhibits are displayed in a showcase at The Sybir Memorial Museum exhibition during a preview before the official opening, in Bialystok, Poland on September 6, 2021. The history of Soviet deportations is the subject of a new museum opening in Bialystok in northeast Poland on September 17 -- the anniversary of the Soviet assault on Poland which followed soon after the Nazi German invasion that triggered World War II. The museum traces the history of the hundreds of thousands of Poles deported to Siberia during Tsarist Russia and Soviet times set in the context of the millions who suffered the same fate. The Soviet deportations in 1940 and 1941 affected some 330,000 people in what was then a very multi-ethnic Poland -- entire families were taken away, including 130,000 children. Wojtek RADWANSKI / AFP.