Marzahn () is a locality within the borough of Marzahn-Hellersdorf in Berlin. Berlin's 2001 administrative reform led to the former boroughs of Marzahn and Hellersdorf fusing into a single new borough. In the north the Marzahn locality includes the neighbourhoods of Bürknersfelde and Ahrensfelde, an overbuilt strip of land which once had belonged to the Brandenburg municipality of Ahrensfelde and was incorporated into Berlin in 1990. Geography Subdivision Marzahn is divided into three zones (Ortslagen): Marzahn-Nord (Berlin-Ahrensfelde) Marzahn-Mitte Marzahn-Süd History The historic village of Marzahn was first mentioned as Morczane in a 1300 deed by Margrave Albert III of Brandenburg-Salzwedel, when he granted the estates to the Friedland Cistercian abbey (in today's Neuhardenberg). After the Thirty Years' War it fell to Elector Frederick William of Brandenburg. The new village church was finished in 1871 according to plans by Friedrich August Stüler, another landmark is the Marzahn post mill, rebuilt in 1994. The village became part of Greater Berlin in 1920, as a locality of the Lichtenberg district. Marzahn was the site of a labour camp (today a water treatment plant), where Romani were interned during the 1936 Summer Olympics in Berlin, away from visitors' eyes. As a part of the Nazi Porajmos extermination policy, up to 2000 inmates remained there until in 1943, when they were deported to Auschwitz-Birkenau, where most of them were gassed. In 1941 the large factory of the Carl Hasse & Wrede machine tool company (now Knorr-Bremse) was erected, where hundreds of forced labourers were employed. The victims were buried at the nearby Parkfriedhof; a memorial marks the site. On 21 April 1945, during the opening phase of the Battle of Berlin, the city's eastern district of Marzahn was the first in Berlin to be conquered by the Soviet Red Army under General Nikolai Berzarin's command. A single-storey building (Landsberger Allee 563), apparently the "first freed house", still stands today on Landsberger Allee as a memorial to the Soviet victory after the battle. A part of East Berlin from 1949, Marzahn remained a rural site until 1977 when vast housing estates were built on its fields by order of the East German authorities. The construction, carried out in the typical plattenbau prefabricated-building style, dragged on until the late 1980s. In the course of the considerable population growth Marzahn was separated from Lichtenberg in 1979 to become a borough in its own right and in 1986 the