This is where the SS guards were trained for all of Nazi Germany. Before any person could be considered to be a guard in the concentration camp they had to show 5 years of dedication to the Nazi party and then they would enter this facility where contact with the outside community was limited and they were psychologically brainwashed.
In Biology they were taught about the racial hierarchy. They learned about Darwinism and the survival of the fittest, the fittest being the Aryan race. By destroying these lower human beings they would be helping along the life cycle of the earth.
They were also taught courses about how Jews have been the cause of great problems for the last 400 years, wars, famines, pestilence all caused by the Jews.
This is now the training center for the Berlin Police force, a constant reminder about how power can corrupt.
Prisoners were the bar staff, particularly the Jehovah's Witnesses as an additional slap in the face since they were against such things. Working here was a very dangerous job. SS guards were themselves very harsh, but a drunk SS guard was even worse, so one small slip up would prove to be very grave.
You will also notice that this is built of wood. Hitler had many of his buildings here built with wood as he fully intended to win the war and said that in 20 years there would be no enemies to the Nazi's and that these camps would no longer be needed.....very confident.The prisoners would arrive at the train station in the town outside the camp and be marched to these gates.
They would be "briefed" which meant stripped naked, dunked in a cold antibiotic bath (no matter what the weather), have their head shaved, receive a cotton uniform and be given a number. All this was meant to demoralize the prisoners and strip them of their identity so they would be easier to control.
Speaking of the cold, today it was windy and about 30 degrees. At one point the tour guide actually turned around and said, "What a nice day", he wasn't joking....I guess it is very commonly hovering around 0 degrees.
They would then line up the prisoners and tell them the rules of the camp and while they were talking the SS guards would be watching the crowd for one person who was looking down or seemed to be not paying attention and bring them to the front of the group and beat them to death as an example to the rest, all part of the routine briefing.