Petrozavodsk
During the Finnish occupation of Petrozavodsk, the city was named Äänislinna (or Ääneslinna). The city was retaken by the Soviet army on 28 June 1944. The Finns set up concentration camps in the city for people of non-Finnic ethnicity. In total, six camps were set up; which in total held 23,984 civilians of Russian ethnicity.