The Checkpoint Charlie Museum (German: Das Mauermuseum – Museum Haus am Checkpoint Charlie) is a private museum in Berlin. It is named after the famous crossing point on the Berlin Wall, and was created to document the so-called "best border security system in the world" (in the words of East German general Heinz Hoffmann). On display are the photos and related documents of successful escape attempts from East Germany, together with the escape apparatus: hot-air balloons, getaway cars, chairlifts, and a mini-U-Boat. The museum researches and maintains a list of deaths at the Berlin Wall. It is operated by the Arbeitsgemeinschaft 13. August (August 13th Working Group), and the director is Alexandra Hildebrandt.
The Arbeitsgemeinschaft 13. August is an association named after the date the Berlin Wall was constructed. It was formed with the purpose to fight against human rights violations as a result of the wall, and to create solutions through activities such as press conferences, publishing, and exhibitions. The museum project began as an exhibition by founding director and human rights activist Rainer Hildebrandt. According to Hildebrandt: "The first exhibition opened on the 19 October 1962 in an apartment with only two and a half rooms in famous Bernauer Straße. The street was divided along its whole length; the buildings in the east had been vacated and their windows were bricked up. We suggested that tourists be thankful to those border guards who do not shoot to kill".
On 14th June 1963, the museum opened in its permanent location on Friedrichstraße, known as Haus am Checkpoint Charlie. The Arbeitsgemeinschaft 13. August e. V. was formally registered with the city as a Verein (association) on 16 July 1963. The museum in its early days was known for its jumbled and chaotic exhibition style, with many objects and relics displayed without the usual organization of a conventional museum. It was also a political center, and actively involved in planning and assisting escapes. It featured a library, films, lectures, and a publishing operation.