The Gate Prisoners at work on the construction of the main gate of Birkenau concentration camp. SS Photograph, 1944. The entrance gate that prisoners called the "Gate of Death" was located in the main SS guardhouse building. Trains carrying deportees entered here after May 1944 on the railroad spur that extended into the camp. Earlier, trains had stopped outside the camp. The main gate of Birkenau concentration camp, through which trains carrying deportees entered the camp after May 1944, is visible in the background. SS photograph, 1944.