Holy See of the East of Rome also claims the title of the Catholicos and the Holy Apostolic See of St. Thomas. Patriarch Mar Addai II, is the Catholicos of the Ancient Church of the East. The current Seat of the Catholicos of Ancient Church of the East is in Baghdad, Iraq. The official title of the Head & Father of the Syro-Malabar Catholic Church is "the successor to the Holy Apostolic See of St. Thomas and the Gate of All India". The church is headed by the Major Archbishop of Ernakulam-Angamaly, Cardinal Maran Mar George Alencherry. The current Seat of the Major Archiepiscopal Curia
Holy See are 15 internationally recognized states with which the Holy See does not have relations. The Holy See is the only European subject of international law that has diplomatic relations with the government of the Republic of China (usually known as Taiwan) as representing China, rather than the government of the People's Republic of China (see Holy See–Taiwan relations). The British Foreign and Commonwealth Office speaks of Vatican City as the "capital" of the Holy See, although it compares the legal personality of the Holy See to that of the Crown in Christian monarchies and declares that the Holy See and