Four-Power Authorities of Germany. Both were in West Berlin, Germany, and existed during the Cold War from 1948 to 1989. These were the Berlin Air Safety Center and Spandau Prison (which was demolished in 1987 when Rudolf Hess, the sole remaining prisoner, died). These two organizations were uniquely four-powered in that American, British, French, and Soviet authorities cooperated in their management. This was a far cry from the intensely adversarial relations the allies had with the Warsaw Pact leader in almost every other aspect of world affairs during this time. Both organizations remained low-profile and secretive during their existences to avoid highlighting
Spandau Citadel were redesigned for museums and exhibition. Today, Spandau Citadel is famous for its open-air concerts during the Citadel Music Festival. Scenes from the 1985 action film "Gotcha!" were filmed at and around Spandau Citadel. Spandau Citadel The Spandau Citadel () is a fortress in Berlin, Germany, one of the best-preserved Renaissance military structures of Europe. Built from 1559–94 atop a medieval fort on an island created by the meeting of the Havel and the Spree, it was designed to protect the town of Spandau, which is now part of Berlin. In recent years it has been used as a museum