Source Data Reference for:

City = Rome
Time = 1900

City	Year	Size	Size Comment	Year Comment	Author	Title	Location
Rome	1875	251,000			Tertius Chandler	Four thousand years of urban growth	p536
Rome	1875	251,000			Tertius Chandler	Four thousand years of urban growth	p520
Rome	1875	252,000			Tertius Chandler	Four thousand years of urban growth	p491
Rome	1900	438,000			Tertius Chandler	Four thousand years of urban growth	p492
Rome	1900	510,000	"in top 40 hence over 510,000"		Tertius Chandler	Four thousand years of urban growth	p563
Rome	1900	438,000			Tertius Chandler	Four thousand years of urban growth	p536
Rome	1900	487,000			Tertius Chandler	Four thousand years of urban growth	p540
Rome	1901	462,800			Jan Lahmeyer	http://www.populstat.info/	n/a
Rome	1914	570,000			Tertius Chandler	Four thousand years of urban growth	p504