The Auschwitz concentration camp included three camps on one complex and was the largest of its kind established by the Nazi regime during World War II.
Each camp held prisoners who were forced into labor. One of the camps on the complex also functioned for some time as a killing center.
At least 960,000 Jews were killed in the camp. Other victims included the following: 74,000 Poles, 21,000 Roma Gypsies, 15,000 Soviet prisoners of war and an estimated 10,000 to 15,000 others.
Source: United States Holocaust Memorial Museum, ushmm.org