Mauthausen-Gusen concentration camp grew to become a large group of Nazi concentration camps that was built around the villages of Mauthausen and Gusen in Upper Austria.
Auschwitz concentration camp was a network of concentration and extermination camps built and operated by the Third Reich in Polish areas annexed by Nazi Germany during World War II. It consisted of Auschwitz I (the base camp); Auschwitz II–Birkenau (the extermination camp); Auschwitz III–Monowitz (a labor camp to staff an IG Farben factory), and 45 satellite camps.
Majdanek was a Nazi concentration camp established on the outskirts of the city of Lublin during German occupation of Poland.
Janowska was a Nazi German labor, transit and concentration camp established September 1941 in occupied Poland on the outskirts of Lwów (Poland, today Lviv in Ukraine).
The Warsaw concentration camp was an associated group of the German Nazi concentration camps, possibly including an extermination camp, located in German-occupied Warsaw, capital city of Poland.
Sachsenhausen was a Nazi concentration camp in Oranienburg, Germany, used primarily for political prisoners from 1936 to the end of the Third Reich in May 1945.