Model introduction: The gas chamber and incinerator model of the No. 2 crematorium of the Brzezinka Concentration Camp (Auschwitz 2) displayed in Building 4. There were gas chambers underground. Jews were tricked into taking a bath in the bathroom, but there was no water at all in the showerhead. What was sprayed out was highly toxic hydrogen chloride (Zyklon B). Fifteen minutes later, all the Jews in the "bathhouse" were poisoned to death. On the first floor was the incinerator, into which the poisoned Jews were put for incineration.