BaptismBaptism (from váptisma) is a Christian sacrament of initiation and adoption, almost invariably with the use of water. It may be performed by sprinkling or pouring water on the head, or by immersing in water either partially or completely, traditionally three times, once for each person of the Trinity. The synoptic gospels recount that John the Baptist baptised Jesus. Baptism is considered a sacrament in most churches, and as an ordinance in others.
TrinityThe Christian doctrine of the Trinity (Trinitas, from trinus 'threefold') is the central doctrine concerning the nature of God in most Christian churches, which defines one God existing in three , , consubstantial divine persons: God the Father, God the Son (Jesus Christ) and God the Holy Spirit, three distinct persons (hypostases) sharing one essence/substance/nature (homoousion) As the Fourth Lateran Council declared, it is the Father who s, the Son who is , and the Holy Spirit who proceeds.
Eastern Orthodox ChurchThe Eastern Orthodox Church, also called the Orthodox Church and officially the Orthodox Catholic Church, is the second-largest Christian church, with approximately 220 million baptized members. It operates as a communion of autocephalous churches, each governed by its bishops via local synods. The church has no central doctrinal or governmental authority analogous to the head of the Catholic Church—the pope—but the Ecumenical Patriarch of Constantinople is recognized by them as primus inter pares ("first among equals").
ValensValens (Ouálēs; 328 – 9 August 378) was Roman emperor from 364 to 378. Following a largely unremarkable military career, he was named co-emperor by his elder brother Valentinian I, who gave him the eastern half of the Roman Empire to rule. In 378, Valens was defeated and killed at the Battle of Adrianople against the invading Goths, which astonished contemporaries and marked the beginning of barbarian encroachment into Roman territory. As emperor, Valens continually faced threats both internal and external.
ErasmusDesiderius Erasmus Roterodamus (ˌdɛzɪˈdɪəriəs_ɪˈræzməs; ˌdeːziˈdeːriʏs eˈrɑsmʏs; English: Erasmus of Rotterdam or Erasmus; 28 October 1466 – 12 July 1536) was a Dutch Christian humanist, Catholic theologian, educationalist, satirist and philosopher. Through his vast number of translations, books, essays and letters, he is considered one of the most influential thinkers of the Northern Renaissance and one of the major figures of Dutch and Western culture.
AriusArius (əˈraɪəs,_ˈɛəri-; Ἄρειος, Áreios; 250 or 256 – 336) was a Cyrenaic presbyter, ascetic, and priest associated with the doctrine of Arianism. His teachings about the nature of the Godhead in Christianity, which emphasized God the Father's uniqueness and Christ's subordination under the Father, and his opposition to what would become the dominant Christology (Homoousian Christology) made him a primary topic of the First Council of Nicaea convened by Emperor Constantine the Great in 325.
TransubstantiationTransubstantiation (Latin: transubstantiatio; Greek: μετουσίωσις metousiosis) is, according to the teaching of the Catholic Church, "the change of the whole substance of bread into the substance of the Body of Christ and of the whole substance of wine into the substance of the Blood of Christ". This change is brought about in the eucharistic prayer through the efficacy of the word of Christ and by the action of the Holy Spirit. However, "the outward characteristics of bread and wine, that is the 'eucharistic species', remain unaltered".
Doctor of the ChurchDoctor of the Church (Latin: doctor "teacher"), also referred to as Doctor of the Universal Church (Latin: Doctor Ecclesiae Universalis), is a title given by the Catholic Church to saints recognized as having made a significant contribution to theology or doctrine through their research, study, or writing. But more importantly, a Doctor of the Church is one who has been officially recognized by the Roman Catholic Church for having lived a very holy, humble, self-mortifying, sacrificial life, and having been a stout defender of orthodoxy.
GratianGratian (ˈɡreɪʃən, ; Gratianus; 18 April 359 – 25 August 383) was emperor of the Western Roman Empire from 367 to 383. The eldest son of Valentinian I, Gratian accompanied his father on several campaigns along the Rhine and Danube frontiers and was raised to the rank of Augustus in 367. Upon the death of Valentinian in 375, Gratian took over government of the west while his half-brother Valentinian II was also acclaimed emperor in Pannonia. Gratian governed the western provinces of the empire, while his uncle Valens was already the emperor over the east.
Valentinian IIValentinian II (Valentinianus; 371 - 15 May 392) was a Roman emperor in the western part of the Roman empire between AD 375 and 392. He was at first junior co-ruler of his brother, was then sidelined by a usurper, and only after 388 sole ruler, albeit with limited de facto powers. A son of emperor Valentinian I and empress Justina, he was raised to the imperial office at the age of 4 by military commanders upon his father's death.
