Source Data Reference for:

City = Metz
Time = 1800

City	Year	Size	Size Comment	Year Comment	Author	Title	Location
Metz	1800	39,000			Jan De Vries	European urbanization 1500-1800	p274
Metz	1800	46,000			Paul Bairoch	La population des villes europeennes de 800 a 1850
Metz	1800	37,000			Tertius Chandler	Four thousand years of urban growth	p23
Metz	1800	37,000			Tertius Chandler	Four thousand years of urban growth	p487
Metz	1815	42,200			Valentin Parisot	Dictionnaire geographique universelle