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 weakened the authority of the Holy See throughout much of Europe. Following the French Revolution, the Papal states was briefly occupied as the "Roman Republic" in 1798–1799 as a sister republic of the First French Empire under Napoleon, before the territority was reestablished. Notwithstanding, the Holy See was represented in and identified as a "permanent subject of general customary international law vis-à-vis all states" in the Congress of Vienna in 1814-1815. The Papal States was recognised under the rule of the Papacy and largely restored to their former extent. Despite the Capture of Rome in 1870 by the Kingdom of