Source Data Reference for:

City = Izmit
Time = 200

City Year Size Size Comment Year Comment Author Title Location
Izmit100 1,000"below 30,000"Tertius ChandlerFour thousand years of urban growthp463
Izmit290"only smaller than Rome, Alex&ria & Antioch in the Roman Empire"soon after becoming capital under Diocletian in 286Edward GibbonThe decline and fall of the Roman empirev1 p385