It consisted of Auschwitz I, the main camp (Stammlager) in Oświęcim; Auschwitz II-Birkenau, a concentration and extermination camp with gas chambers; Auschwitz III-Monowitz, a labor camp for the chemical conglomerate IG Farben; and dozens of subcamps.

Is Bergen Belsen still standing?

The camp has been in continuous operation since then and is today known as Bergen-Hohne Training Area. It is used by the NATO armed forces. The workers who constructed the original buildings were housed in camps near Fallingbostel and Bergen, the latter being the so-called Bergen-Belsen Army Construction Camp.

Who betrayed Anne Frank's?

Willem Gerardus van Maaren (August 10, 1895 - November 28, 1971) was the person most often suggested as the betrayer of Anne Frank.