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Justinian's reign begins. He reconquers parts of the fallen Western Empire (Africa and Italy, Spain). He codifies the Previous Roman Laws into one document. Constantinople is the most glorious city in europe, with 500,000 inhabitants. The Hagia Sofia is constructed. Justinian is the last emperor to use the title "Caesar".
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Muslims attack Constantinople.
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Emperor Leo III bans the use of Icons.
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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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The use of Icons is restored.
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Bulgars unsuccessfully attack Constantinople unsuccessfully.
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Defeat at Manzikert to the Seljuk Turks. Permanent loss of most of Asia Minor.
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Byzantines defeated in Thrace.
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Crusaders arrive at Constantinople. The Crusaders are successful, but eventually withdraw from cooperation with the Byzantines.
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Fall of Constantinople to the Ottomans. End of the Byzantine Empire.