Source Data Reference for:

City = Cologne
Time = 1900

City Year Size Size Comment Year Comment Author Title Location
Cologne1875 166,000Tertius ChandlerFour thousand years of urban growthp520
Cologne1900 372,500Jan Lahmeyerhttp://www.populstat.info/n/a
Cologne1900 437,000Tertius ChandlerFour thousand years of urban growthp492
Cologne1914 621,000Tertius ChandlerFour thousand years of urban growthp504