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Gentile Christians accepted alongside those in the Jewish tradition.
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Christianity becomes a legal religion within the Roman empire.
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Arian heresy which declared Christ was a created being is refuted. Nicene Creed is drawn up, declaring Christ to be "...Begotten, not made; of one essence with the Father..."
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(The doctrine that Christ was two persons (one human, the other divine) in one body). Mary is declared Theotokos i.e. 'God-bearer' or more commonly, 'Mother of God'.
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(Latin: 'and the son') into the Nicene-Constantinopolitan Creed at a council in Toledo.
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Eastern Orthodox and Western Catholic churches separate.
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Pope Urban II authorises the first Crusade to recover the Holy Land from Moslems.
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Sack of Constantinople during the fourth crusade.
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Defence of Orthodox spirituality by Gregory Palamas. Rise of Hesychasm.
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Following the return of the Papacy to Rome, rival claimants (Antipopes) emerge. Dispute ends in 1417 with election of Martin V.
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Martin Luther posts his 95 Theses in Wittenburg, Germany; beginning the Protestant reformation.
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Act of Supremacy passed - Henry VIII becomes supreme head of the English church.
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Council of Trent - Roman Catholic counter reformation.
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First Vatican council. Dogma of Papal infallibility proclaimed.
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Billy Graham born. Later becomes one of the most prominent evangelists in Christian history.
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Formation of the World Council of Churches.
Dogma of the Assumption of Mary proclaimed by the Roman Catholic Church. -
Second Vatican council. Major reforms in the Roman Catholic church are initiated.
Mutual anathemas of 1054 between Roman Catholic and Orthodox churches lifted.