Stasi Headquarters Berlin – The Heart of the GDR Surveillance State

Location and the Complex

The former headquarters of the Ministry for State Security (MfS) is located in the Berlin district of Lichtenberg, approximately 6 kilometres east of Alexanderplatz. The complex still encompasses around 50 buildings spread across a site of several hectares. Built from 1950 onwards, this was the nerve centre of East Germany's secret police until 1990 – and until its occupation by civil rights activists on 15 January 1990, completely invisible to the public.

The Stasi: Numbers and System

The Ministry for State Security was one of the most effective intelligence apparatuses in history. At the time of its dissolution in 1990, it employed around 91,000 full-time staff – one Stasi officer for every 63 East German citizens. In addition, an estimated 174,000 to 620,000 unofficial informants (IMs) spied on neighbours, colleagues, friends and family members.

The Stasi archive, now administered by Germany's Federal Archives, comprises approximately 111 kilometres of files – laid end to end, a distance from Berlin to Frankfurt. Add to that millions of photographs, thousands of video reels, and the so-called "Rosenholz" dataset containing the real names of West German informants, which was only returned from CIA holdings after 2000.

Erich Mielke's Office and Building 1

The centrepiece of the site is Building 1 (Haus 1) – the main building where Minister Erich Mielke presided from 1957 to 1989. Mielke's office has been preserved exactly as it was: the dark green desk, the red leather chairs, the direct telephone line to Moscow, the display case of medals and decorations. Mielke ruled the apparatus that kept the East German population in fear for 32 years – and was himself a profoundly mistrustful man who barely trusted his closest colleagues.

The upper floors also contain the eavesdropping installation through which Mielke had the telephone calls of his own ministers recorded. The system of suspicion knew no exceptions – not even the leadership itself was safe from it.

15 January 1990: The Occupation and the Battle to Save the Files

On 15 January 1990, two months after the fall of the Berlin Wall, thousands of Berliners occupied the Stasi headquarters in Lichtenberg – preventing the systematic destruction of files that was already well underway. Staff had been shredding and tearing up millions of pages in the preceding weeks. The civil rights activists secured what could still be secured. The shredded files are still being reconstructed today with puzzle machines and AI technology – a project likely to continue for decades.

Today: Memorial Site and Research

The Stasi Headquarters Memorial has been open to visitors since 1995. Building 1 can be toured with a guide; the permanent exhibition "State Security in the SED Dictatorship" explains the structure, methods and impact of the surveillance apparatus. The memorial is also the starting point for accessing personal Stasi files: those affected can submit a request to the Federal Archives – an offer still used by thousands of people every year, decades after the GDR's end.