Source Data Reference for:

City = Cologne
Time = 1200

City Year Size Size Comment Year Comment Author Title Location
Cologne1150 40,000Tertius ChandlerFour thousand years of urban growthp471
Cologne1200 50,000Tertius ChandlerFour thousand years of urban growthp472
Cologne1200 50,000Paul BairochLa population des villes europeennes de 800 a 1850
Cologne1200 50,000Tertius ChandlerFour thousand years of urban growthp16