Saint Thomas Christians in the context of "Malankara Mar Thoma Syrian Church"

In the Catholic Church, a bishop is an ordained minister who holds the fullness of the sacrament of holy orders and is responsible for teaching doctrine, governing Catholics in his jurisdiction, sanctifying the world and representing the church. Catholics trace the origins of the office of bishop to the apostles, who it is believed were endowed with a special charism and office by the Holy Spirit at Pentecost. Catholics believe this special charism and office has been transmitted through an unbroken succession of bishops by the laying on of hands in the sacrament of holy orders.

Diocesan bishops—known as eparchial bishops in the Eastern Catholic Churches—are assigned to govern local regions within the Catholic Church known as dioceses in the Latin Church and eparchies in the Eastern Churches. Bishops are collectively known as the College of Bishops and can hold such additional titles as archbishop, cardinal, patriarch, or pope. As of 2020, there were approximately 5,600 living bishops total in the Latin and Eastern churches of the Catholic Church.

A pendant is a loose-hanging piece of jewellery, generally attached by a small loop to a necklace, which may be known as a "pendant necklace". A pendant earring is an earring with a piece hanging down. Its name stems from the Latin word pendere and Old French word pendr, both of which translate to "to hang down". In modern French, pendant is the gerund form of pendre ("to hang") and also means "during". The extent to which the design of a pendant can be incorporated into an overall necklace makes it not always accurate to treat them as separate items.

In some cases, though, the separation between necklace and pendant is far clearer.

Thomas the Apostle (Greek: Θωμᾶς, romanized: Thōmâs; Classical Syriac: ܬܐܘܡܐ, romanized: Tʾōmā, meaning 'the Twin'), also known as Didymus (Greek: Δίδυμος, romanized: Dídymos 'twin'), was one of the Twelve Apostles of Jesus according to the New Testament. Thomas is commonly known as "doubting Thomas" because he initially doubted the resurrection of Jesus when he was told of it (as is related in the Gospel of John); he later confessed his faith ("The lord of me and the God of me") on seeing the places where the wounds appeared still fresh on the holy body of Jesus after the Crucifixion of Jesus.

According to traditional accounts of the Saint Thomas Christians of Kerala, Thomas travelled outside the Roman Empire to preach the Gospel, traveling through southern India in the modern states of Kerala and Tamil Nadu, and eventually reached Muziris (modern-day North Paravur and Kodungalloor) in 52 AD. He started the Church of the East in the region around the Van Province, Edessa, and Hakkari regions of Upper Mesopotamia (modern-day southeastern Turkey), presumably sometime between mid-late 30s and 45, and spent many years evangelizing both Jews and pagans in the area before heading further east in the late 40s. In 1258, some of the relics were brought to Ortona, in Abruzzo, Italy, where they have been held in the Church of Saint Thomas the Apostle. He is regarded as the patron saint of India among its Christian adherents, and the Feast of Saint Thomas on July 3 is celebrated as Indian Christians' Day. The name Thomas remains quite popular among the Saint Thomas Christians of the Indian subcontinent.

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.

Terms for Syriac Christians are endonymic (native) and exonymic (foreign) terms, that are used as designations for Syriac Christians, as adherents of Syriac Christianity. In its widest scope, Syriac Christianity encompass all Christian denominations that follow East Syriac Rite or West Syriac Rite, and thus use Classical Syriac as their main liturgical language. Traditional divisions among Syriac Christians along denominational lines are reflected in the use of various theological and ecclesiological designations, both historical and modern. Specific terms such as: Jacobites, Saint Thomas Syrian Christians, Maronites, Melkites, Nasranis, and Nestorians have been used in reference to distinctive groups and branches of Eastern Christianity, including those of Syriac liturgical and linguistic traditions. Some of those terms are polysemic, and their uses (both historical and modern) have been a subject of terminological disputes between different communities, and also among scholars.

Territorially, Syriac Christians are divided in two principal groups: Syriac Christians of the Near East, and Syriac Christians of India. Terminology related to Syriac Christians of the Near East includes a specific group of ethnoreligious terms, related to various Semitic communities of Neo-Aramaic-speaking Christians, that are indigenous to modern Syria, Iraq, Iran, Turkey, Lebanon, Israel, Jordan, and Palestine.

Metropolitanate of India (Syriac: Beth Hindaye) was an East Syriac ecclesiastical province of the Church of the East, at least nominally, from the seventh to the sixteenth century. The Malabar region (Kerala) of India had long been home to a thriving Eastern Christian community, known as the Saint Thomas Christians. The community traces its origins to the evangelical activity of Thomas the Apostle in the 1st century. The Christian communities in India used the East Syriac Rite, the traditional liturgical rite of the Church of the East. They also adopted some aspects of Dyophysitism of Theodore of Mopsuestia, often inaccurately referred as Nestorianism, in accordance with theology of the Church of the East. It is unclear when the relation between Saint Thomas Christian and the Church of the East was established. Initially, they belonged to the metropolitan province of Fars, but were detached from that province in the 7th century, and again in the 8th, and given their own metropolitan bishop.

Due to the distance between India and the seat of the Patriarch of the Church of the East, communication with the church's heartland was often spotty, and the province was frequently without a bishop. An eleventh-century reference states that the metropolitan province of India had been 'suppressed', due to communication difficulties. At the beginning of the fourteenth century the Indian Church was again dependent on the Church of the East. Although India was supplied with bishops from the Middle East, the effective control lay in the hands of an indigenous priest known as Arkkadiyakkon or Archdeacon. He was the community leader of Saint Thomas Christians. Even in times when there were multiple foreign bishops, there was only one archdeacon for entire Saint Thomas Community. As such, the Indian church was largely autonomous in operation, though the authority of the Patriarch was always respected.