East Syriac Rite in the context of "Syrian Malabar Nasrani"

The Eastern Catholic Churches or Oriental Catholic Churches, also known as the Eastern-Rite Catholic Churches, Eastern Rite Catholicism, or simply the Eastern Churches, are 23 Eastern Christian autonomous (sui iuris) particular churches of the Catholic Church in full communion with the pope in Rome. Although they are distinct theologically, liturgically, and historically from the Latin Church, they are all in full communion with it and with each other. Eastern Catholics are a minority within the Catholic Church; of the 1.3 billion Catholics in communion with the pope, approximately 18 million are members of the Eastern churches. The largest numbers of Eastern Catholics are found in Eastern Europe, Eastern Africa, the Middle East, and India. As of 2022, the Syro-Malabar Church is the largest Eastern Catholic Church, followed by the Ukrainian Greek Catholic Church.

With the exception of the Maronite Church, the Eastern Catholic Churches are groups that, at different points in the past, used to belong to the Eastern Orthodox Church, the Oriental Orthodox churches, or the Church of the East; these churches underwent various schisms through history. Eastern Catholic Churches that were formerly part of other communions have been points of controversy in ecumenical relations with the Eastern Orthodox and other non-Catholic churches. The five historic liturgical traditions of Eastern Christianity, namely the Alexandrian Rite, the Armenian Rite, the Byzantine Rite, the East Syriac Rite, and the West Syriac Rite, are all represented within Eastern Catholic liturgy. On occasion, this leads to a conflation of the liturgical word "rite" and the institutional word "church". Some Eastern Catholic jurisdictions admit members of churches not in communion with Rome to the Eucharist and the other sacraments.

The Assyrian Church of the East (ACOE), sometimes called the Church of the East and officially known as the Holy Apostolic Catholic Assyrian Church of the East, is an Eastern Syriac Christian denomination that follows the traditional Christology and ecclesiology of the historical Church of the East. It belongs to the eastern branch of Syriac Christianity, and employs the Divine Liturgy of Saints Addai and Mari belonging to the East Syriac Rite. Its main liturgical language is Classical Syriac, a dialect of Eastern Aramaic. Officially known as the Church of the East until 1976, it was then renamed the Assyrian Church of the East, with its patriarchate remaining hereditary until the death of Shimun XXI Eshai in 1975.

The Assyrian Church of the East is officially headquartered in the city of Erbil, in northern Iraq; its original area encompassed Iraq, southeastern Turkey, northeastern Syria and northwestern Iran, corresponding roughly to ancient Assyria. The current Catholicos-Patriarch of the Assyrian Church of the East, Mar Awa III, was consecrated in September 2021.

The Church of the East (Classical Syriac: ܥܕܬܐ ܕܡܕܢܚܐ ʿĒḏtā d-Maḏenḥā) or the East Syriac Church, also called the Church of Seleucia-Ctesiphon, the Persian Church, the Assyrian Church, the Babylonian Church, the Chaldean Church or the Nestorian Church, is one of three major branches of Eastern Nicene Christianity that arose from the Christological controversies in the 5th century and the 6th century, alongside that of Miaphysitism (which came to be known as the Oriental Orthodox Churches) and Chalcedonian Christianity (from which Catholicism, Eastern Orthodoxy and Protestantism would arise).

Having its origins in Mesopotamia during the time of the Parthian Empire, the Church of the East developed its own unique form of Christian theology and liturgy. During the early modern period, a series of schisms gave rise to rival patriarchates, sometimes two, sometimes three. In the latter half of the 20th century, the traditionalist patriarchate of the church underwent a split into two rival patriarchates, namely the Assyrian Church of the East and the Ancient Church of the East, which continue to follow the traditional theology and liturgy of the mother church. The Chaldean Catholic Church based in Iraq and the Syro-Malabar Church in India are two Eastern Catholic churches which also claim the heritage of the Church of the East.

The Dormition of the Mother of God is a Great Feast of the Eastern Orthodox, Oriental Orthodox, and Eastern Catholic Churches (except the East Syriac churches). It celebrates the "falling asleep" (death) of Mary the Theotokos ("Mother of God", literally translated as God-bearer), and her being taken up into heaven. The Feast of the Dormition is observed on August 15, which for the churches using the Julian calendar corresponds to August 28 on the Gregorian calendar. The Armenian Apostolic Church celebrates the Dormition not on a fixed date, but on the Sunday nearest 15 August. In Western Churches the corresponding feast is known as the Assumption of Mary, with the exception of the Scottish Episcopal Church, which has traditionally celebrated the Falling Asleep of the Blessed Virgin Mary on August 15.

Christian canonical scriptures do not record the death or Dormition of Mary. Hippolytus of Thebes, a 7th- or 8th-century author, writes in his partially preserved chronology of the New Testament that Mary lived for 11 years after the death of Jesus, dying in AD 41.

Cosmas Indicopleustes (Koine Greek: Κοσμᾶς Ἰνδικοπλεύστης, lit. 'Cosmas who sailed to India'; also known as Cosmas the Monk) was a merchant and later hermit from Alexandria in Egypt. He was a 6th-century traveller who made several voyages to India during the reign of emperor Justinian. His work Christian Topography contained some of the earliest and most famous world maps.Cosmas was a pupil of the East Syriac Patriarch Aba I and was himself a follower of the Church of the East.

The Syro-Malabar Church, also known as the Syro-Malabar Catholic Church / Edta Qatholiqi D’Malabar Suryaya,Syriac: ܥܸܕܬܵܐ ܩܵܬܘܿܠܝܼܩܝܼ ܕܡܲܠܲܒܵܪ ܣܘܼܪܝܵܝܵܐ (or ܥܸܕܬܵܐ ܕܡܲܠܲܒܵܪ ܣܘܼܪܝܵܝܵܐ); Malayalam: സുറിയാനി മലബാർ സഭ is an Eastern Catholic church based in Kerala, India. It is a sui iuris (autonomous) particular church in full communion with the Holy See and the worldwide Catholic Church, with self-governance under the Code of Canons of the Eastern Churches (CCEO). The major archbishop presides over the entire church. The incumbent Major Archbishop is Raphael Thattil, serving since January 2024. It is the largest Syriac Christian church and the largest Eastern Catholic church. Syro-Malabar is a prefix reflecting the church's use of the East Syriac liturgy and origins in Malabar (modern Kerala and parts of Tamil Nadu). The name has been in usage in official Vatican documents since the nineteenth century.

The Syro-Malabar Church is primarily based in India; with five metropolitan archeparchies and ten suffragan eparchies in Kerala, there are 4 Archeparchies and 13 eparchies in other parts of India, and four eparchies outside India. 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. It is the largest among Saint Thomas Christians communities, with a population of 2.35 million in Kerala as per the 2011 Kerala state census and 4.53 million worldwide as estimated in the 2023 Annuario Pontificio. It is the second largest sui juris church within the communion of the Catholic Church after the Latin Church.

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 practiced in the Maronite Church, the Syriac Orthodox Church, the Syriac Catholic Church and various Malankara Churches of India (see the section on usage below). It is one of two main liturgical rites of Syriac Christianity, the other being the East Syriac Rite.It originated in the ancient Patriarchate of Antioch. It has more anaphora than any other rite.

Although the West Syriac liturgical tradition had always included many texts translated from Greek, this new influx of materials of Greek origin led to the emergence of two slightly different Syriac Orthodox traditions, that of Antioch, incorporating these new elements, and that of Tikrit, which did not incorporate it. It was essentially the Tikrit rite that was introduced into South India in the 18th and 19th century.