Entrance to Sachenhausen Concentration Camp. Photo ©Heather Shimmin About 40 km north of Berlin, in the small town of Oranienburg, is Sachsenhausen, the first Nazi Concentration Camp.  Sachsenhausen’s design was the model on which all other Concentration Camps were based.  Its triangular shape was so that a single, mounted machine gun in the watch tower (in the centre of the triangle’s base) could reach the entire camp.   The