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Constantinople is named the capital of the Eastern half of the Roman empire

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Rome is sacked by barbarians. Millions flee the city as Rome is burned to the group

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The Catholic Church holds supreme power in Europe during middle ages.

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Emperor Justinian rules over the Byzantine Empire.

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Vikings invade Western Europe from Scandinavia.

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Feudalism becomes the primary social system in Europe.

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The Black Death arrives in Europe. 50-70 million people in Europe die.