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The ancient city of Byzantium, renamed Constantinople and later becomes the capital of the Byzantine Empire.
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The eastern Roman empire was based in Constantinople and the western Roman empire based in Rome.
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The Eastern Roman empire survives and becomes known as the Byzantine Empire.
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He conquers Africa, Spain and Italy which were part of the Western Roman empire. The Hagia Sophia was constructed.
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They eventually took northern Italy from the Byzantines.
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They temporarily hold Mesopotamia. They lose Palestine, Syria and Egypt to the Muslims.
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The attack by the Muslims is held off.
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Pope Leo III in Rome crowns him and for the first time in 300 years there is an emperor in the east and the west.
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He attacks both Bithynia and later Constantinople. The Byzantines destroy the Russian fleet.
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Destroying them earns him the title of Bulgaroktonos "Bulgar slayer"
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The Latin Roman Church and the Greek Orthodox church excommunicate each other.
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This resulted in the permanent loss of Asia Minor.
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It is at the Council of Piacenza
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This happened at Myriokephalon and hopes of regaining Asia minor are lost.
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The Latin Empire of Constantinople is formed.
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When Constantinople fell to the Ottomans it effectively caused the fall of the Byzantine empire.