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İzmit

City and municipality in Marmara, Turkey

  • 11 min read
  • 14 chapters
The Kocaeli Sign in İzmit City Center
Wiki leylek · CC BY 4.0

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Through Roman Empire, Constantinople and Byzantium

İzmit was known as Nicomedia and Ólbia in antiquity, and was the eastern and most senior capital city of the Roman Empire between 286 and 324, during the Tetrarchy introduced by Diocletian. Following Constantine the Great's victory over co-emperor Licinius at the Battle of Chrysopolis (modern Üsküdar) in 324, Nicomedia served as an interim capital city for Constantine until 330, when Constantinople (modern Istanbul) was officially proclaimed as the new capital of the Roman Empire. During the Ottoman Empire, İzmit was the capital of the Sanjak of Kocaeli. At present, the Istanbul-İzmit area is one of the main industrial regions in Turkey.

Name

İzmit was known as Nicomedia (Ancient Greek: Νικομήδεια) and Ólbia (Ancient Greek: Ὀλβία) in antiquity. İzmit derives from Nicomedia, prefixed with εἰς 'to' or 'into' (similar to Istanbul). Names used in English prior to official Turkish Latinization include Ismid, Iskimid, and Isnikmid.

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