Source Data Reference for:

City = Cologne
Time = 1850

City Year Size Size Comment Year Comment Author Title Location
Cologne1850 95,000Tertius ChandlerFour thousand years of urban growthp24
Cologne1850 110,000Paul BairochLa population des villes europeennes de 800 a 1850
Cologne1852 100,000passed for the 1st timeTertius ChandlerFour thousand years of urban growthp542
Cologne1861 113,1001861/62n/aGothaischer Hofkalender