Source Data Reference for:

City = Leiden
Time = 1850

City Year Size Size Comment Year Comment Author Title Location
Leiden1840 37,500Jan Lahmeyerhttp://www.populstat.info/n/a
Leiden1850 37,000Paul BairochLa population des villes europeennes de 800 a 1850
Leiden1850 35,000Tertius ChandlerFour thousand years of urban growthp26