Arbeit Macht Frei", or "work makes one free". The camp's prisoners left the camp during the day for construction or farm labor. The exact number of victims at Auschwitz is impossible to fix with certainty. The Nazis soldiers destroyed a most of the records. Estimates of the total deaths range from 800,000 to five million prisioners, about 90 percent were Jews from almost every country in Europe.
Auschwitz II and the remains of the gas chambers there are also open to the public. The Auschwitz concentration camp is part of the UNESCO list of World Heritage Sites. Most of the buildings of Auschwitz I are still standing. Many of them are now used as museums.
Auschwitz-Birkenau was the largest of Nazi Germany's concentration camps. Prisoners were transported from all over German-occupied Europe by rail to Auschwitz-Birkenau in daily. Arrivals were separated into two main groups; those marked for immediate extermination, and those to be registered as prisoners. The entrance to Auschwitz I was marked with the sign