The Auschwitz-Birkenau complex was established in 1940 and throughout the five years of its inglorious operation over 1.5 million Jews, Poles, Italians and Frenchman perished here. It should be emphasized that the prisoners of Auschwitz originated from every country in Europe. The museum was founded in 1947, combining the area of KL Auschwitz (Auschwitz I) in Oświęcim and the Birkenau camp (Auschwitz II) in Brzezinka; it comprises approximately 150 buildings and 300 ruins. The original roads, fences, watchtowers and railway ramps have been preserved. The buildings house the collection of original exhibits and documents. In 1979, the concentration camp was designated as one of the UNESCO's World Heritage Sites.