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Constantine found the new capital of the Roman Empire on the existing side of the amcients Greek city Binzantium.
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The Eastern Empire survives and now is labeled as the Byzantine Empire.
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He reconquers parts of the fallen Western Empire. He codifies the Previous Roman Laws into one document. Constantinople is the most glorious city in europe, with 500,000 inhabitants. Justinian is the last emperor to use the title "Caesar".
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Heraclius becomes emperor. The theme system is installed. The Empire's language changes to Greek. Eventual Lost of Syria, Palestine, and Egypt to Muslims.
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Byzantines defeated in Thrace.
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Byzantine Army defeated by the Sultanate of Rum at Myriokephalon. Hopes of regaining Asia Minor are lost.
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Fall of Constantinople to the Ottomans. End of the Byzantine Empire.
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Charlemagne, king of the Franks, is crowned "Emperor of the Romans" by Pope Leo III in Rome. For the first time in 300 years, there is an emperor of the "East" and an emperor of the "West".
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Prince Igor of Kiev attacks Bithynia and later attacks Constantinople: The Byzantines destroys the Russian fleet.
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The use of Icons is restored.
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Basil II becomes Emperor.
