The site of the Commandants House showing supports for suspended floor system with hot air to heat rooms above, dating from AD138, Cilurnum (Chesters Roman Fort), Hadrian's Wall, UNESCO World Heritage Site, Chollerford, Northumbria National Park, England, United Kingdom, Europe

Gallows where Rudolf Hoss, the camp commandant, was hanged, Auschwitz concentration camp, UNESCO World Heritage Site, Oswiecim, near Krakow (Cracow), Poland, Europe

Camp Commander, Penal Camp, Red Army, Nizhny Novgorod, Russia

Commandant's House, Queen's Bastion, with moats, Spandau Citadel fortress, Berlin, Germany, Europe

Commandant's House, with moats, Spandau Citadel fortress, Berlin, Germany, Europe

Commandant's House, Queen's Bastion, with moats, Spandau Citadel fortress, Berlin, Germany, Europe