From early 1942 until late 1944, transport trains delivered Jews to Auschwitz gas chambers from all over German occupied Europe.
1.3 million people were killed, around 90 percent of them Jewish.
Those not killed in the gas chambers died of starvation, forced labor, infectious diseases, individual executions, and medical experiments.
In January 1945, Auschwitz was liberated by Soviet troops.
Today Auschwitz is a museum which has seen more then 30 Million visitors.