Source Data Reference for:

City = Rome
Time = 800

City	Year	Size	Size Comment	Year Comment	Author	Title	Location
Rome	800	50,000			Paul Bairoch	La population des villes europeennes de 800 a 1850
Rome	800	50,000			Tertius Chandler	Four thousand years of urban growth	p14
Rome	800	50,000			Tertius Chandler	Four thousand years of urban growth	p467
Rome	800	50,000			Tertius Chandler	Four thousand years of urban growth	p528