Demographics of Cologne and on 1 April 1888 ended in a first major incorporation. The territorial expansion, beginning in the late 19th century, were significant marks for the city's population growth. Major communal reorganizations took place in 1910, 1914, 1922 and 1975. Demographics of Cologne Cologne () is Germany's fourth-largest city and the largest city in the Rhineland. As of 31 December 2011, there were officially 1,017,155 residents. The city is center of the Cologne/Bonn Region with around 3 million inhabitants (including the neighboring cities of Bonn, Hürth, Leverkusen, and Bergisch Gladbach). The walls of Colonia Agrippina covered an area of 96.8 hectares,
NS Documentation Centre of the City of Cologne 2008, part of Cologne's city museums associations. So within the municipal administration, it is responsible for dealing with all subjects related to the city's Nazi past, including the visitor programs for former forced labourers, which the city has been running since 1989. The center has been the recipient of numerous awards, including the "special recommendation" of the 2000 Museum of the Year Award. The NS Documentation Center of the City of Cologne has been awarded several times: In 2004 Elzbieta Adamski, Employee of the NS Documentation Center of the City of Cologne, received by the hands of the president of