By Maxwell Adelman
Each building containing prisoners was built to contain around 800, but held closer to 1200 in practice. The barracks were unheated in the winter, had no sanitary facilities, and there was only one lavatory with 22 toilets on the ground floor. There were around 135,000 prisoners in the camp at its peak in 1944, which accounted for approximately 25% of all the people in the entire concentration camp system.
One of the important figures from this part of the camp was an SS physician named Josef Mengele, who conducted pseudoscientific research on infants, twins, and dwarfs, and also performed forced sterilizations and castrations on adults.