Entrance to Werl Prison located in the state of North Rhine-Westphalia, east of Dortmund, Germany. The prison was populated with more than 5,300 French POWs when it was liberated on 7 April 1945. The prison was used by the British to house Nazi war criminals after their convictions of war crimes and crimes against humanity. The last two former Nazi inmates were released in 1957. Photo by anonymous (c. 1940s).