Catholicos

Catholicos (plural: Catholicoi) is a title used by the head bishop of any of certain Eastern churches.

The title is used in the Armenian Apostolic Church, which is one of the Oriental Orthodox churches. His Holiness, the Catholicos of All Armenians presides over the Supreme Spiritual Council (the Armenian Church's governing college of bishops), and is the head of the world's 7 million Armenian Apostolic Christians. It is also used in the Georgian Orthodox and Apostolic Church, whose head carries the title Catholicos-Patriarch of All Georgia. Historically, the title was also used by the chief bishop of Caucasian Albania.