was mainly used for women prisoners. The name "Roter Ochse" is the informal name of the prison, possibly originating in the 19th century from the colour of the external walls. It still operates as a prison for young people. Since 1996, the building which was used as an interrogation centre by the Stasi and an execution site by the Nazis has been a museum and memorial centre for victims of political persecution. Leipzig (Memorial Museum in the "Round Corner") - The former Stasi district headquarters on am Dittrichring is now a museum focusing on the history and activities of the organisation. It is named after the curved shape of the front of the building. The Stasi used the building from 1950 until 1989. On the evening of 4 December 1989, it was occupied by protesters in order to stop the destruction of Stasi files. There has been a permanent exhibition on the site since 1990. The building also houses the Leipzig branch of the Stasi Records Agency, which holds about 10 km of files on its shelves. Lübschützer Teiche Stasi Bunker - The Stasi Bunker Museum is in Machern, a village about 30 km from Leipzig. It is managed by the Runde Ecke Museum administration. The bunker was built from 1968 to 1972, as a fallout shelter for the staff of the Stasi's Leipzig administration in case of a nuclear attack. It could accommodate about 120 people. The bunker, which was disguised as a holiday resort on 5.2 hectares of land, was only discovered in December in 1989. "The emergency command centre was a secretly-created complex, designed to maintain the Stasi leadership's hold on power, even in exceptional circumstances." The whole grounds are classified as a historic monument and are open to the public on the last weekend of every month, and for pre-arranged group tours at other times. GDR Execution site - The execution site at Alfred-Kästner-Straße in south Leipzig, was the central site in East Germany where the death penalty was carried out from 1960 until 1981. It remains in its original condition. The management of the "Runde Ecke" Museum opens the site once a year on "Museum night" and on special state-wide days when historic buildings and sites that are not normally accessible to the public are opened. Magdeburg - The memorial site at Moritzplatz in Magdeburg is a museum on the site of a former prison,