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518
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After the accession of his uncle and adoptive father Justin to the imperial throne, Justinian holds several important government offices and plays a major role in guiding his uncle's policies.
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525
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Justinian is given the rank of caesar by Justin I.
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4 Apr 527
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Justinian Becomes Co-emperor
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1 Aug 527
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Emperor Justin I dies and Justinian I becomes sole emperor.
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534
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Justinian I sponsors an important codification of laws known as the Codex Justinianus.
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Mar 534
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Justinian I retakes North Africa from the Vandals.
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24 Dec 537
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Hagia Sophia completed
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540
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Justinian Recovers Ravenna
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7 May 558
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Dome of the Hagia Sophia collapses
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14 Nov 565
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Emperor Justinian I dies in Constantinople (modern Istanbul, Turkey).