Source Data Reference for:

City = Tournai
Time = 1850

City	Year	Size	Size Comment	Year Comment	Author	Title	Location
Tournai	1850	30,000			Paul Bairoch	La population des villes europeennes de 800 a 1850
Tournai	1850	30,000			Tertius Chandler	Four thousand years of urban growth	p26
Tournai	1862	31,200			n/a	Gothaischer Hofkalender