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Cologne is the fourth-largest city in Germany after Berlin, Hamburg and Munich. As of 31 December 2016, there were 1,080,701 people registered as living in Cologne in an area of . The population density was . The metropolitan area of the Cologne Bonn Region is home to 3,573,500 living on . It is part of the polycentric megacity region Rhine-Ruhr with a population of over 11,000,000 people.
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