Former Nazi German concentration camp Auschwitz-Birkenau

Barbed wire historical fence at the former Nazi German concentration and extermination camp Auschwitz-Birkenau in Oswiecim, Poland seen at June 30, 2020. German forces established Auschwitz after they invaded and occupied Poland, and killed more than 1.1 million people there, most of them Jews but also Poles, Roma, Soviet prisoners of war, and others. In all, about 6 million European Jews died during the Holocaust.