Logo NSDOK Koeln.svg|thumb|right EL-DE Haus, officially the Nazism Documentation Center, located in Cologne, is the former headquarters of the Gestapo and now a museum documenting the Third Reich.
EL-DE Haus, exterior view
The building was at first the business premises of jeweler Leopold Dahmen, and the building takes its name from his initials. In 1934, the Nazis rented the building from him and turned it into the headquarters of the secret police, the Gestapo. Surprisingly, the building survived the Allied bombing of Cologne during World War II, while 90% of the city was destroyed. After the bombings, the basements of the building, which had been used as prison cells and torture rooms for forced laborers and political enemies, were used to store wartime files and paperwork. Inscriptions made on the walls of the prison cells by inmates can still be viewed today. The building was the site of many executions, as well as deaths due to overcrowding and poor hygienic conditions.
In 2006, the National Socialist Documentation Center was awarded the Best in Heritage award, which is given to select museums. The only other German museum to have won the prize is the Buddenbrook Museum in L beck.
EL-DE Haus Gallery
File:Cologne-EL-DE-House-UpperFloorMuseum.JPG|Museum in upper floor file:Cologne-EL-DE-House-CellBlock-1.JPG|Basement Cell Block File:Zelle 1 EL-DE-Haus.jpg|Cell 1 in basement File:Cologne-EL-DE-House-CellGraffiti.JPG|Original Graffiti in basement cell