Districts of Cologne within city limits), while 174,87 km² (43.2 percent) lie right of the Rhine. In regard to population, Cologne is the largest city in the state of North Rhine-Westphalia and the fourth largest city in Germany. Since the city's foundation in 38 BC, Cologne grew through numerous extensions and incorporation of surrounding municipalities. Since the construction of the Medieval wall in 1180, the area of the old imperial city of Cologne has not changed for more than 600 years and was only extended over the old city walls in 1794, just short before the arrival of French troops and Cologne's incorporation
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