Before World War II, Warsaw was the home of 375,000 Jews, one third of the population of the city. It once had the largest Jewish population of any city in Europe.
There were six major gassing centres: Auschwitz II (minimum estimate for number of victims gassed: 900,000) Treblinka II (minimum estimate: 850,000) Sobibor (mimum estimate: 250,000) Chelmno (about...