Ecumenical councilAn ecumenical council, also called general council, is a meeting of bishops and other church authorities to consider and rule on questions of Christian doctrine, administration, discipline, and other matters in which those entitled to vote are convoked from the whole world (oikoumene) and which secures the approbation of the whole Church.
Reformation_The Reformation The Reformation (alternatively named the Protestant Reformation, and the European Reformation) was a major movement in Western Christianity in 16th-century Europe that posed a religious and political challenge to the Catholic Church and in part, it also posed a challenge to papal authority. The Reformation marked the start of Protestantism and in the Western Church, the Latin Church, remained the Catholic Church. It is considered one of the events that signified the end of the Middle Ages and the beginning of the early modern period in Europe.
Nicene CreedThe Nicene Creed (ˈnaɪsiːn; Sýmvolon tis Nikéas) is the defining statement of belief of Nicene or mainstream Christianity and in those Christian denominations that adhere to it. The original Nicene Creed was first adopted at the First Council of Nicaea in 325. In 381, it was amended at the First Council of Constantinople. The amended form is also referred to as the Nicene Creed, or the Niceno-Constantinopolitan Creed for disambiguation.
Christian theologyChristian theology is the theology of Christian belief and practice. Such study concentrates primarily upon the texts of the Old Testament and of the New Testament, as well as on Christian tradition. Christian theologians use biblical exegesis, rational analysis and argument.
HeresyHeresy is any belief or theory that is strongly at variance with established beliefs or customs, particularly the accepted beliefs or religious law of a religious organization. A heretic is a proponent of heresy. Heresy in Christianity, Judaism, and Islam has at times been met with censure ranging from excommunication to the death penalty. Heresy is distinct from apostasy, which is the explicit renunciation of one's religion, principles or cause; and from blasphemy, which is an impious utterance or action concerning God or sacred things.
Athanasius of AlexandriaAthanasius I of Alexandria (296–298 – 2 May 373), also called Athanasius the Great, Athanasius the Confessor, or, among Coptic Christians, Athanasius the Apostolic, was a church father and the 20th pope of Alexandria (as Athanasius I). His intermittent episcopacy spanned 45 years (8 June 328 – 2 May 373), of which over 17 encompassed five exiles, when he was replaced on the order of four different Roman emperors. Athanasius was a Christian theologian, a Church Father, the chief defender of Trinitarianism against Arianism, and a noted Egyptian Christian leader of the fourth century.
Constantine the GreatConstantine I (27 February 272 - 22 May 337), also known as Constantine the Great, was Roman emperor from AD 306 to 337. He was the first emperor to convert to Christianity. Born in Naissus, Dacia Mediterranea (now Niš, Serbia), he was the son of Flavius Constantius, a Roman army officer of Illyrian origin who had been one of the four rulers of the Tetrarchy. His mother, Helena, was a Greek woman of low birth and a Christian. Later canonized as a saint, she is traditionally attributed with the conversion of her son.
UnitarianismUnitarianism () is a Nontrinitarian branch of Christianity. Unitarian Christians affirm the unitary nature of God as the singular and unique creator of the universe, believe that Jesus Christ was inspired by God in his moral teachings and that he is the savior of humankind, but he is not comparable or equal to God himself. Unitarianism was established in order to restore "primitive Christianity before [what Unitarians saw as] later corruptions setting in"; Likewise, Unitarian Christians generally reject the doctrine of original sin.
Augustine of HippoAugustine of Hippo (ɔːˈɡʌstᵻn , USalsoˈɔːɡəstiːn ; Aurelius Augustinus Hipponensis; 13 November 354 – 28 August 430), also known as Saint Augustine, was a theologian and philosopher of Berber origin and the bishop of Hippo Regius in Numidia, Roman North Africa. His writings influenced the development of Western philosophy and Western Christianity, and he is viewed as one of the most important Church Fathers of the Latin Church in the Patristic Period. His many important works include The City of God, On Christian Doctrine, and Confessions.
EusebiusInfobox saint | honorific_prefix= Saint | name = Eusebius of Caesarea | image = St. Eusebius T'oros Roslin Gospels.png | caption = Icon portrait of the church historian Eusebius of Caesarea as a saint from T'oros Roslin Gospel manuscript in Armenia dated 1262 | titles = The Father of Church History | venerated_in = Syriac Orthodox Church"The Church Historian and Metropolitan of Caesarea for twenty five years is included, on the list, among the Syrian martyrs and those who vouched for true faith (Wace & Piercy, 1999).
