Syriac Orthodox Patriarch of Antioch and All the East in the context of "Syriac Orthodox Church"

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. It serves India's Saint Thomas Christian (also known as Nasrani) population. According to tradition, these communities originated in the missions of Thomas the Apostle in the 1st century (circa 52 AD). It employs the Malankara Rite, an Indian form of the West Syriac liturgical rite.

The MOSC descends from the Malankara Church and its affiliation with the Syriac Orthodox Church. However, between 1909 and 1912, a schism over the authority of the Syriac Orthodox Patriarch of Antioch resulted in the dissolution of the unified Malankara Church and establishment of the overlapping and conflicting MOSC and Jacobite Syrian Christian Church (JSCC). Since 1912, the MOSC has maintained a catholicate, the Catholicos of the East and Malankara Metropolitan of Malankara Orthodox Church–presently Baselios Marthoma Mathews III–who is the primate of the church.

The pope (Coptic: Ⲡⲁⲡⲁ, romanized: Papa; Arabic: البابا, romanized: al-Bābā, lit. 'father'), officially the pope of Alexandria and the patriarch of the see of St. Mark, also known as the bishop of Alexandria, or the patriarch of Alexandria, is the leader of the Coptic Orthodox Church, with ancient Christian roots in Egypt. The primacy of the Patriarch of Alexandria is rooted in his role as successor to Saint Mark, who was consecrated by Saint Peter, as affirmed by the Council of Nicaea. It is one of three Petrine Sees affirmed by the council alongside the Patriarch of Antioch and the Pope of Rome. The current holder of this position is Pope Tawadros II, who was selected as the 118th pope on November 18, 2012.

Following the traditions of the church, the Pope is chairman and head of the Holy Synod of the Coptic Orthodox Patriarchate of Alexandria. The Holy Synod is the highest authority in the Church of Alexandria, which has between 12 and 18 million members worldwide, 10 to 14 million of whom are in Egypt. The pope is also the chairman of the church's General Congregation Council.

Mor Ignatius Aphrem II (Syriac: ܡܪܝ ܐܝܓܢܛܝܘܣ ܐܦܪܝܡ ܬܪܝܢܐ, Arabic: إغناطيوس أفرام الثاني; born 3 May 1965 as Sa'id Karim; Arabic: سعيد كريم, romanized: Saʽīd Kārīm) is a Syrian-American Christian prelate who has served as the Patriarch of the Syriac Orthodox Church since 29 May 2014.

Born and raised in Qamishili, Syria, Karim took the vows of a monk in 1985 and was later ordained as a deacon and then as a priest. He received a Bachelor of Arts in Divinity from the Coptic Theological Seminary in Cairo in 1988. In 1992, he received a Licentiate of Sacred Theology and in 1994, a Doctor of Divinity from St Patrick's College, Ireland.

Mor Baselios Joseph (Syr: ܡܳܪܝ̱ ܒܰܣܺܝܠܺܝܳܘܣ ܝܰܘܣܶܦ݂; Mal: മോർ ബസേലിയോസ് ജോസഫ്; Born 10 November 1960) is the current and 81st Maphrian of Syriac Orthodox Church, 4th Catholicos of India and 26th Malankara Metropolitan of the Malankara Syriac Orthodox Church (Malankara Church). He also serves as the Metropolitan of the Kochi Diocese and Angamali Diocese.

He was elevated to the position of Catholicos on March 25, 2025 at St. Mary's Cathedral, Atchaneh, Lebanon in a service presided by Ignatius Aphrem II, the Syriac Orthodox Patriarch of Antioch.

The Catholicos of India, also referred to as the Catholicos of the East or the Maphrian is the head of the Jacobite Syrian Christian Church. He is ordained by the Patriarch of Antioch and functions within the Syriac Orthodox Church at an ecclesiastical-rank second to him. He presides over the Holy Synod of the Jacobite Syrian Christian Church. The current Catholicos of India is Baselios Joseph, who was elevated on March 25, 2025.

The Catholicate is considered the continuation of the historical Maphrianate of the East which was established in the 7th century, to oversee the affairs of the Syriac Orthodox Church in Persia under the jurisdiction of the Patriarchate of Antioch. It was abolished in 1860 by the Holy Synod of the Syriac Orthodox Church, and reestablished in Kerala in 1964 with the title "Catholicos" with jurisdiction over India. The Catholicos is seated at Mar Athanasius Cathedral, Puthencruz, Kerala.