Location Nicomedia > Izmit (Kocaeli) Kocaeli Turkey Nicomedia > Izmit (Kocaeli), Kocaeli, Turkey 40.7667, 29.9167 1225 CE Capital Of Bithynia et Pontus (Roman province) Substate Bithynia, Kingdom of State Optimatoi, Theme of Substate Roman Empire: Constantinian dynasty (Nicomedia) State Roman Empire: Tetrarchy State People Al-Mahdi Alexios I Komnenos Andronikos III Palaiologos Anselm IV Antigonus II Gonatas +86 more Groups Polytheism Anatolia, archaic Iranian peoples Thracians Arab people +82 more Topics Younger Subboreal Period Trojan War Bronze Age collapse Iron Age, Near and Middle East Greek colonization +40 more Subjects Origins Environment Human Migration Movements Technology +12 more Commodities Weapons Domestic animals Grains and produce Ceramics Slaves +5 more Locations Nicomedia > Izmit (Kocaeli) Kocaeli Turkey Cite this entry Moran, J. (2017). Nicomedia > Izmit (Kocaeli) Kocaeli Turkey. History Atlas. Retrieved 11 October 2026, from https://www.historyatlas.com/locations/nicomedia-izmit-kocaeli-kocaeli-turkey/ Related events Loading related events…
