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  2. Edict of Thessalonica - Wikipedia

    en.wikipedia.org/wiki/Edict_of_Thessalonica

    The Edict of Thessalonica (Greek: Έδικτο της Θεσσαλονίκης), issued on 27 February AD 380 by Theodosius I, made Nicene Christianity [note 1] the state church of the Roman Empire. [ 2 ] [ 3 ] [ 4 ] It condemned other Christian creeds such as Arianism as heresies of "foolish madmen," and authorized their punishment .

  3. Christianity as the Roman state religion - Wikipedia

    en.wikipedia.org/wiki/Christianity_as_the_Roman...

    In the year before the First Council of Constantinople in 381, Christianity became the official religion of the Roman Empire when Theodosius I, emperor of the East, Gratian, emperor of the West, and Gratian's junior co-ruler Valentinian II issued the Edict of Thessalonica in 380, [1] which recognized the catholic orthodoxy [a] of Nicene Christians as the Roman Empire's state religion.

  4. Timeline of official adoptions of Christianity - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_official...

    364 – Rome returns to Christianity, specifically the Arian Church; c. 364 – Vandals (Arian Church) 376 – Goths and Gepids (Arian Church) 380 – Rome goes from Arian to Catholic/Orthodox (both terms are used refer to the same Church until 1054) 411 – Kingdom of Burgundy (Nicene Church) c. 420 – Najran (Nicene Church) 448 – Suebi ...

  5. Religion in ancient Rome - Wikipedia

    en.wikipedia.org/wiki/Religion_in_ancient_Rome

    In 380, under Theodosius I, Nicene Christianity became the official state religion of the Roman Empire. Christian heretics as well as non-Christians were subject to exclusion from public life or persecution, though Rome's original religious hierarchy and many aspects of its ritual influenced Christian forms, [ 215 ] and many pre-Christian ...

  6. Christianity in the 4th century - Wikipedia

    en.wikipedia.org/wiki/Christianity_in_the_4th...

    Christianity in the 4th century was dominated in its early stage by Constantine the Great and the First Council of Nicaea of 325, which was the beginning of the period of the First seven Ecumenical Councils (325–787), and in its late stage by the Edict of Thessalonica of 380, which made Nicene Christianity the state church of the Roman Empire.

  7. Theodosius I - Wikipedia

    en.wikipedia.org/wiki/Theodosius_I

    Theodosius I (Ancient Greek: Θεοδόσιος Theodosios; 11 January 347 – 17 January 395), also known as Theodosius the Great, was a Roman emperor from 379 to 395. He won two civil wars and was instrumental in establishing the Nicene Creed as the orthodox doctrine for Nicene Christianity.

  8. Christianity in late antiquity - Wikipedia

    en.wikipedia.org/wiki/Christianity_in_late_antiquity

    On February 27, 380, the Roman Empire officially adopted Trinitarian Nicene Christianity as its state religion. [8] Prior to this date, Constantius II (337-361) and Valens (364-378) had personally favored Arian or Semi-Arianism forms of Christianity, but Valens' successor Theodosius I supported the Trinitarian doctrine as expounded in the Nicene Creed.

  9. Persecution of Christians - Wikipedia

    en.wikipedia.org/wiki/Persecution_of_Christians

    379–395) that Christianity would become the official religion of the empire with the joint promulgation of the Edict of Thessalonica, establishing Nicene Christianity as the state religion and as the state church of the Roman Empire on 27 February 380.