Holy See of the East Holy See of the East Holy See of the East is an honorary name of the sees of a number of Christian churches in the Middle East and India. The Head & Father of the Marthoma Nazrani Church and the Gate of All India is commonly known as the successor to the Holy Apostolic See of St. Thomas. The Seat of the Patriarchs of the Chaldean Catholic Church and the Nestorian Catholicos-Patriarchs which emerged from the Ancient Church of the East is also a part of the Holy See of the East. The group of Saint Thomas Christians who left
Mother See of Holy Etchmiadzin Mother See of Holy Etchmiadzin Mother See of Holy Etchmiadzin (, "Mayr At'oř Surb Ēĵmiatsin"), is the governing body of the Armenian Apostolic Church. It is headquartered around Etchmiadzin Cathedral in Vagharshapat (Etchmiadzin), Armenia and is the seat of the Catholicos of All Armenians, the head of the church. The organizational structure of the Mother See of Holy Etchmiadzin is composed of spiritual and administrative bodies representing the authority of the Armenian Church, as follows: The Supreme Spiritual Council ( "Geraguyn Hokevor Khorhurt") is headed by the Catholicos of All Armenians. It is the highest executive body of the Armenian