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A chorbishop is a rank of Christian clergy below bishop. The name chorepiscope or chorepiscopus (plural chorepiscopi) is taken from the Greek χωρεπίσκοπος and means "rural bishop".
Chorepiscopi are first mentioned by Eusebius as existing in the second century.  In the beginning, it seems the chorepiscopi exercised regular episcopal functions in their rural districts, but from the late third century they were subject to city or metropolitan bishops. The Synod of Ancyra (314) specifically forbade them to ordain deacons or priests. The Council of Sardica (343) decreed that no chorepiscopus should be consecrated where a priest would suffice,  and so the chorepiscopi in the Byzantine Church gradually disappeared. 
The first mentions of chorepiscopi in the Western church are from the 5th or 6th century, where they were found mainly in Germany (especially Bavaria) and the Frankish lands.  In the Western Church, they were treated as auxiliary bishops and operated like archdeacons or vicars general.  They gradually disappeared as an office by the 12th century in the West  and were replaced by archdeacons to administer subdivisions of a diocese.
In the principality of Kakheti in medieval Georgia, the title of chorepiscopus (k'orepiskoposi or k'orikozi) became secular and was borne by several princes of that province from the early 9th century into the 11th. 
Some Eastern Catholic and Oriental Orthodox churches still have chorbishops.
The Churches of the Syriac tradition — namely the Syriac Orthodox Church, the Assyrian Church of the East, the Syriac Catholic Church, the Maronite Church, the Chaldean Catholic Church, the Syro-Malankara Catholic Church, the Malankara Jacobite Syriac Orthodox Church, and the Malankara Orthodox Syrian Church — also preserve the office, calling it corepiscopa or coorepiscopa. In these churches, the chorbishop vests almost identically to the bishop and often serves as his representative to various liturgical events to add solemnity.
In the Maronite Church, a chorbishop is the highest of the three Median Orders, ranking above the orders of archdeacon and periodeut. Like a bishop, a chorbishop is ordained, and entitled to all vestments proper to a bishop, including the mitre (hat) and crozier (staff).  The Synod of Mt. Lebanon (1736) limited only the jurisdiction of a chorbishop, permitting him to ordain to the minor orders (cantor, reader and the subdiaconate), but not the major orders of diaconate, priesthood, or episcopacy.  The manuscript tradition of the Syriac Maronite Church demonstrates that the same text is used for the imposition of hand for both bishops and chorbishops.  The title of the ordination for a chorbishop reads, in fact, "The chirotony by which are completed the chorbishops and the metropolitans and the high orders of priesthood."  The role of protosyncellus (vicar general) is often filled by a chorbishop.
In some Orthodox churches, "chorbishop" is an alternative name for an auxiliary bishop.[ citation needed ]
The Malankara Orthodox Syrian Church (MOSC) also known as the Indian Orthodox Church (IOC) or simply as the Malankara Church, is an autocephalous Oriental Orthodox church headquartered in Devalokam, near Kottayam, India. The church serves India's Saint Thomas Christian population. According to tradition, these communities originated in the missions of Thomas the Apostle in the 1st century. It employs the Malankara Rite, an Indian form of the West Syriac liturgical rite.
The Syriac Catholic Church is an Eastern Catholic Christian jurisdiction originating in the Levant that uses the West Syriac Rite liturgy and has many practices and rites in common with the Syriac Orthodox Church. Being one of the twenty-three Eastern Catholic Churches, the Syriac Catholic Church is a self-governed sui iuris particular church, while it is in full communion with the Holy See and with the entirety of the Catholic Church.
An exarch was the holder of any of various historical offices, some of them being political or military and others being ecclesiastical.
The Saint Thomas Christians, also called Syrian Christians of India, Marthoma Suriyani Nasrani, Malankara Nasrani, or Nasrani Mappila, are an ethno-religious community of Indian Christians in the state of Kerala, who, for the most part, employ the Eastern and Western liturgical rites of Syriac Christianity. They trace their origins to the evangelistic activity of Thomas the Apostle in the 1st century. The Saint Thomas Christians had been historically a part of the hierarchy of the Church of the East but are now divided into several different Eastern Catholic, Oriental Orthodox, Protestant, and independent bodies, each with their own liturgies and traditions. They are Malayalis and speak Malayalam. Nasrani or Nazarene is a Syriac term for Christians, who were among the first converts to Christianity in the Near East.
The Syro-Malankara Catholic Church, also known as the Malankara Syrian Catholic Church, is an Eastern Catholic sui iuris particular church in full communion with the worldwide Catholic Church possessing self-governance under the Code of Canons of the Eastern Churches. It is one of the major archiepiscopal churches of the Catholic Church. It is headed by Major Archbishop Baselios Cardinal Cleemis Catholicos of the Major Archdiocese of Trivandrum based in Kerala, India.
The Syro-Malabar Catholic Church is an Eastern Catholic church based in Kerala, India. The Syro-Malabar Church is an autonomous particular church in full communion with the pope and the worldwide Catholic Church, including the Latin Church and the 22 other Eastern Catholic churches, with self-governance under the Code of Canons of the Eastern Churches (CCEO). The Church is headed by the Major Archbishop of the Syro-Malabar, currently George Alencherry. The Syro-Malabar Synod of Bishops canonically convoked and presided over by the Major Archbishop constitutes the supreme authority of the Church. The Major Archiepiscopal Curia of the Church is based in Kakkanad, Kochi. Syro-Malabar is a prefix reflecting the church's use of the East Syriac Rite liturgy and origins in Malabar. The name has been in usage in official Vatican documents since the nineteenth century.
An archdeacon is a senior clergy position in the Church of the East, Chaldean Catholic Church, Syriac Orthodox Church, Anglican Communion, St Thomas Christians, Eastern Orthodox churches and some other Christian denominations, above that of most clergy and below a bishop. In the High Middle Ages it was the most senior diocesan position below a bishop in the Catholic Church. An archdeacon is often responsible for administration within an archdeaconry, which is the principal subdivision of the diocese. The Oxford Dictionary of the Christian Church has defined an archdeacon as "A cleric having a defined administrative authority delegated to him by the bishop in the whole or part of the diocese." The office has often been described metaphorically as that of oculus episcopi, the "bishop's eye".
The Malankara Mar Thoma Syrian Church, often shortened to Mar Thoma Church, and known also as the Reformed Syrian Church and the Mar Thoma Syrian Church of Malabar, is an autonomous Reformed Oriental church based in Kerala, India. While continuing many of the Syriac high church practices, the church is reformed in its theology and doctrines. It employs a reformed variant of the West Syriac Rite Divine Liturgy of Saint James, translated to Malayalam.
Syriac Christianity is a distinctive branch of Eastern Christianity, whose formative theological writings and traditional liturgies are expressed in the Classical Syriac language, a variation of the Aramaic language. In a wider sense, the term can also refer to Aramaic Christianity in general, thus encompassing all Christian traditions that are based on liturgical uses of Aramaic language and its variations, both historical and modern.
The Synod of Diamper , held at Udayamperoor in June 1599, was a diocesan synod, or council, that created rules and regulations for the ancient Saint Thomas Christians of the Malabar Coast, a part of modern-day Kerala state, India, formally subjugating them and downgrading their whole Metropolitanate of India as the Diocese of Angamale, a suffragan see to the Archdiocese of Goa administered by Latin Church Padroado missionaries. This synod also introduced forced Liturgical Latinisation and the eschewal of local practices and beliefs, leading to a significant ecclesial protest by Saint Thomas Christians known as Coonan Cross Oath and a subsequent schism in the mid-17th century.
The West Syriac Rite, also called the Syro-Antiochian Rite and the West Syrian Rite, is an Eastern Christian liturgical rite that employs the Divine Liturgy of Saint James in the West Syriac dialect. It is practised in the Maronite Church, the Syriac Orthodox Church, the Syriac Catholic Church and various Malankara Churches of India. It is one of two main liturgical rites of Syriac Christianity, the other being the East Syriac Rite.
Mor Gregorios Abdal Jaleel Bawa was the Syriac Orthodox Bishop of Jerusalem from 1664 until his death in 1681. He is chiefly remembered for his 1665 mission to India, by which he established ties between the Malankara Church and the Syriac Orthodox church of Antioch. He is venerated as a saint by his church.
The Jacobite Syrian Christian Church (JSCC), or the Malankara Archdiocese of the Syrian Orthodox Church in India also known as Malankara Jacobite Syrian Orthodox Church, the Jacobite Syrian Church, and the Syriac Orthodox Church in India, is a catholicate based in Kerala, India, of the Syriac Orthodox Church of Antioch and part of the Oriental Orthodox Church. It recognizes the Syriac Orthodox Patriarch of Antioch and All the East as supreme head of the church. It functions autonomously within the church, administered by the Metropolitan Trustee, under the authority of the Maphrian of India, Baselios Thomas I. Following schism with the Malankara Orthodox Syrian Church, is currently the only church in Malankara that is directly under a Syriac Christian Antiochian hierarchy, claiming continuity to the 1665 schism. The church employs the West Syriac Rite Liturgy of Saint James.
Mor Themotheos Thomas is the Metropolitan of Kottayam Diocese and Secretary to the Holy Episcopal Synod of the Jacobite Syrian Christian Church. Mor Themotheos Thomas was ordained as the Metropolitan of the Outside Kerala Diocese on 3 January 1991 by Mor Baselios Paulose II Catholicos of the East .
The Malankara Church, also known as Puthenkur and more popularly as Jacobite Syrians, is the historic unified body of West Syriac Saint Thomas Christian denominations which claim ultimate origins from the missions of Thomas the Apostle. This community, under the leadership of Thoma I, opposed the Padroado Jesuits as well as the Propaganda Carmelites of the Latin Church, following the historical Coonan Cross Oath of 1653. The Malankara Church's modern-day descendants include the Jacobite Syrian Christian Church, the Malankara Orthodox Syrian Church, the Malankara Marthoma Syrian Church, the Malabar Independent Syrian Church, the Syro-Malankara Catholic Church and the Saint Thomas Anglicans of the Church of South India.
The Malankara Rite is the form of the West Syriac liturgical rite practiced by several churches of the Saint Thomas Christian community in Kerala, India. West Syriac liturgy was brought to India by the Syriac Orthodox Bishop of Jerusalem, Gregorios Abdal Jaleel, in 1665; in the following decades the Malankara Rite emerged as the liturgy of the Malankara Church, one of the two churches that evolved from the split in the Saint Thomas Christian community in the 17th century. Today it is practiced by the various churches that descend from the Malankara Church, namely the Malankara Mar Thoma Syrian Church, Malankara Orthodox Syrian Church, the Jacobite Syrian Christian Church, the Syro-Malankara Catholic Church and the Malabar Independent Syrian Church
The Saint Thomas Christian denominations are Christian denominations from Kerala, India, which traditionally trace their ultimate origins to the evangelistic activity of Thomas the Apostle in the 1st century. They are also known as "Nasranis" as well. The Syriac term "Nasrani" is still used by St. Thomas Christians in Kerala.
The Maronite Church is an Eastern Catholic sui iuris particular church in full communion with the pope and the worldwide Catholic Church, with self-governance under the Code of Canons of the Eastern Churches. The current head of the Maronite Church is Patriarch Bechara Boutros al-Rahi, who was elected in March 2011 following the resignation of Patriarch Nasrallah Boutros Sfeir. The current seat of the Maronite Patriarchate is in Bkerke, northeast of Beirut, Lebanon. Officially known as the Antiochene Syriac Maronite Church, it is part of Syriac Christianity by liturgy and heritage.
The Holy Qurobo or Holy Qurbono refers to the Eucharist as celebrated in Syro-Antiochene Rite and the liturgical books containing rubrics for its celebration. West Syriac Rite includes various descendants of the Oriental Orthodox and Eastern Catholic churches. It consists of two distinct liturgical traditions: the Maronite Rite, and the Jacobite Rite. The major Anaphora of both the traditions is the Divine Liturgy of Saint James in Syriac language. The Churches are primarily based in the Middle East, Africa, and India.
The Eastern Catholic Churches of the Catholic Church utilize liturgies originating in Eastern Christianity, distinguishing them from the majority of Catholic liturgies which are celebrated according to the Latin liturgical rites of the Latin Church. While some of these sui iuris churches are of the same liturgical ritual families as other Eastern Catholic churches and Eastern churches not in full communion with Rome, each church retains the right to institute its own canonical norms, liturgical books, and practices for the ritual celebration of the Eucharist, other sacraments, and canonical hours.