EL-DE building, regional HQ of the Gestapo in Cologne from 1935 to 1945

View of the EL-DE building, regional HQ of the Gestapo from 1935 to 1945, in Cologne, Germany, 18 September 2014, where thousands were detained and tortured, and 400 prisoners were executed. The former Gestapo prison and the prisoners' cell wall scribblings, are powerful reminders of the Nazi horrors linked to the EL-DE building. In it is located nowadays the NS Documentation center of the city of Cologne, hosting a permanent exhibition on Cologne under the Nazis. (Photo by Horacio Villalobos/Corbis via Getty Images)