Source Data Reference for:

City = Rome
Time = 600

City	Year	Size	Size Comment	Year Comment	Author	Title	Location
Rome	500	100,000			Tertius Chandler	Four thousand years of urban growth	p465
Rome	500	100,000			George Modelski	World Cities -3000 to 2000	p49
Rome	528	87,500	"btw 50,000 & 125,000"		Colin McEvedy	The New Penguin Atlas of Medieval History ISBN 0-14-051249-7	p25
Rome	550	120,000			Tertius Chandler	Four thousand years of urban growth	p104
Rome	600	50,000	"under 100,000"		George Modelski	World Cities -3000 to 2000	p49
Rome	622	50,000			Tertius Chandler	Four thousand years of urban growth	p106
Rome	622	50,000			Tertius Chandler	Four thousand years of urban growth	p537
Rome	622	50,000			Tertius Chandler	Four thousand years of urban growth	p466