Source Data Reference for:

City = Leuven
Time = 1800

City Year Size Size Comment Year Comment Author Title Location
Leuven1800 19,000Paul BairochLa population des villes europeennes de 800 a 1850
Leuven1800 21,000Jan De VriesEuropean urbanization 1500-1800p272
Leuven1820 25,500Valentin ParisotDictionnaire geographique universelle