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Edict of Milan was the treaty where the Christians agreed on treating the Christians benevolently within the Roman Empire. Western Roman Emperor Constantine I, and Licinius, who ruled the Balkans, met in Milan and agreed to change policies towards Christians. They met when Christianity was legalized, not official.
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Alaric and his Visigoths burst in by the Porta Salaria on the northeast of the city Rome
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He becomes the first pope to take a regnal name. John II obtains valuable gifts as well as a profession of orthodox faith from the Byzantine emperor Justinian.
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: Liturgical, linguistic, and political divisions cause a permanent split between the Eastern and Western Churches, known as the East–West Schism or the Great Schism. The three legates, Humbert of Mourmoutiers, Frederick of Lorraine, and Peter, archbishop of Amalfi, entered the Cathedral of the Hagia Sophia during mass on a Saturday afternoon and placed a papal Bull of Excommunication on the altar against the Patriarch Michael I Cerularius. The legates left for Rome two days later, leaving behin
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The First Crusade was first of the many crusades that attempted to capture the Holy Lands. This was launched by Pope Urban II in November 27th, 1095. During the crusade, people from many of Western Europe travelled over land and by sea, first to Constantinople and then on towards Jerusalem. Then, they assaulted and captured it in 1099.
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The Siege of Jerusalem was a siege on Jerusalem in 1187. On October 2nd or 1187, Balian of Ibelin surrendered the city to Saladin. The defeat of Jerusalem lead to the Third Crusade.
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Ayyubid forces led by Saladin capture Jerusalem, prompting the Third Crusade.
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Lotario de' Conti di Segni elected Pope Innocent III. His pontificate is often considered the height of the temporal power of the papacy.
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Pope Clement V issues the Bull Regnans in coelis calling a general council to meet on October 1, 1310, at Vienne in France for the purpose of making provision in regard to the Order of Knights Templar, both the individual members and its lands, and in regard to other things in reference to the Catholic Faith, the Holy Land, and the improvement of the Church and of ecclesiastical persons"
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William of Ockham flees Avignon. Later, he was excommunicated by Pope John XXII, whom Ockham accused of heresy.