Slide 13
This is the entry gate to Auschwitz I with the famous heading over the gate, "Arbeit macht frei" (works sets you free). This alludes to the fiction that the Germans tried to maintain during World War II that these concentration/extermination camps were just nice work places from which those who were interred could eventually be released if they worked hard. Of course, that was pure nonsense, few made it out, but the entry gate survives to this day.