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Peter and Paul are executed; martyrdom of the church's two greatest apostles forces church leadership into a new era.
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The earliest known public churches are built, signaling a shift in Christians' life and practice.
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The Edict of Milan; made by Constantine 1 the Roman Emperor, Christianity no longer persecuted.
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Augustine Converts to Christianity; greatest early church father;fights Pelagianism; emphasizes authority of Scripture; his thought foundation of the Reformers; wrote City of God.
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Gregory the Great becomes pope; The "first of the medieval popes" takes on civil power and lays the foundations for the papal state. He also commissions, in 597, Augustine's mission to England, which converts the pagan Angels.
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Synod of Whitby decisively aligns the English church with Rome for the next nine centuries.
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The Monastery at Cluny is founded, the genesis of a reform movement that spreads to over 1,000 communities and revitalizes monastic life for hundreds of years.
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Francis of Assisi renounces wealth in order to preach a simple, passionate gospel, and later founds the Franciscan Order.
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Dominic establishes Order of Preachers, who travel barefoot, teach, and convert heretics.
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Constantinople falls to the Turks, ending millennium of Christianity in the Eastern Roman Empire.