Majdanek concentration camp

Majdanek (or Lublin) was a Nazi concentration and extermination camp built and operated by the SS on the outskirts of the city of Lublin during the German occupation of Poland in World War II. It had three gas chambers, two wooden gallows, and some 227 structures in all, placing it among the largest of Nazi concentration camps. Although initially intended for forced labor rather than extermination, it was used to murder an estimated 78,000 people during Operation Reinhard, the German plan to murder all Polish Jews within their own occupied homeland.

Source: Wikipedia — Majdanek concentration camp (CC BY-SA 4.0)