Source Data Reference for:

City = Florence
Time = 1800

City	Year	Size	Size Comment	Year Comment	Author	Title	Location
Florence	1800	81,000			Jan De Vries	European urbanization 1500-1800	p276
Florence	1800	81,000			Paul Bairoch	La population des villes europeennes de 800 a 1850
Florence	1800	61,000			Tertius Chandler	Four thousand years of urban growth	p486
Florence	1800	61,000			Tertius Chandler	Four thousand years of urban growth	p23
Florence	1820	80,000			Valentin Parisot	Dictionnaire geographique universelle