ChrismationChrismation consists of the sacrament or mystery in the Eastern Orthodox, Oriental Orthodox and Eastern Catholic churches, as well as in the Assyrian Church of the East initiation rites. The sacrament is more commonly known in the West as confirmation, although Italian normally uses the term cresima ("chrismation") rather than confermazione ("confirmation"). The term chrismation comes about because it involves anointing the recipient of the sacrament with chrism (holy oil), which according to eastern Christian belief, the Apostles sanctified and introduced for all priests to use as a replacement for the laying on of hands by the Apostles.
Ancient Church of the EastThe Ancient Church of the East is an Eastern Christian denomination. It branched from the Assyrian Church of the East in 1964, under the leadership of Mar Toma Darmo (d. 1969). It is one of three Assyrian Churches that claim continuity with the historical Church of the East (the ancient Patriarchal Province of Seleucia-Ctesiphon), the others being the Assyrian Church of the East and the Chaldean Catholic Church. Since 1969, the see of the Ancient Church of the East is headquartered in Baghdad.
Nestorian schismThe Nestorian schism (431) was a split between the Christian churches of Sassanid Persia, which affiliated with Nestorius, and those that later became the Catholic and Orthodox churches. The schism rose out of a Christological dispute, notably involving Cyril (Patriarch of Alexandria) and Nestorius (Patriarch of Constantinople). The First Council of Ephesus in 431 and the Council of Chalcedon in 451 condemned Nestorius and his doctrine, which emphasized the radical distinctness between Christ's human and divine natures.
CatholicosA catholicos (plural: catholicoi) is the head of certain churches in some Eastern Christian traditions. The title implies autocephaly and, in some cases, it is the title of the head of an autonomous church. The word comes from ancient Greek καθολικός ( () καθολικοί), derived from καθ' ὅλου (, "generally") from κατά (, "down") and ὅλος (, "whole"), meaning "concerning the whole, universal, general"; it originally designated a financial or civil office in the Roman Empire.
Babai the GreatBabai the Great (ܒܵܒܲܝ ܪܲܒܵܐ , c. 551 – 628) was an early church father of the Church of the East. He set several of the foundational pillars of the Church, revived the monastic movement, and formulated its Christology in a systematic way. He served as a monastic visitor and coadjutor with Mar Aba as unofficial heads of the Church of the East (often called the "Nestorian Church" by those in the West) after Catholicos Gregory until 628 AD, leaving a legacy of strong discipline and deep religious Orthodoxy.
Diodorus of TarsusDiodore of Tarsus (Greek Διόδωρος ὁ Ταρσεύς; died c. 390) was a Christian bishop, a monastic reformer, and a theologian. A strong supporter of the orthodoxy of Nicaea, Diodore played a pivotal role in the Council of Constantinople and opposed the anti-Christian policies of Julian the Apostate. Diodore founded one of the most influential centers of Christian thought in the early church, and many of his students became notable theologians in their own right. Diodore was born into a noble family in the area of Antioch.
