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World History: AD 380s

380–389

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Events in this period 1

  1. AD 380 · Europe · Religion

    Christianity becomes the Roman state religion

    The Edict of Thessalonica, issued on 27 February AD 380 by Theodosius I, made Nicene Christianity the state church of the Roman Empire. It condemned other Christian creeds such as Arianism as heresies of "foolish madmen", and authorized their punishment.

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