Holy See of the East the Church of the East after the Coonan Cross Oath and joined the Church of Antioch also claims the title of the Holy See of the East, since St. Thomas is also the founder of this churches. The Malankara Orthodox Syrian Church which evolved out of the Malankara Church as a part of the Oriental Orthodox Churches claims the title of the Catholicos of the East and the Holy Apostolic See of St. Thomas. The Malankara Syrian Catholic Church which evolved from the Malankara Church as a part of the Eastern Catholic Church in full communion with the Holy See
Foreign relations of the Holy See is active in international organizations and is a member of the following groups: The Holy See is also a permanent observer of the following international organizations: The Holy See is an observer on an informal basis of the following groups: The Holy See sends a delegate to the Arab League in Cairo. It is also a guest of honour to the Parliamentary Assembly of the Organization for Security and Cooperation in Europe. Since 6 April 1964, the Holy See has been a "permanent observer state" at the United Nations. In that capacity, the Holy See has since had a standing