- His Holiness The Pope;
- Bishop Of Rome And Vicar Of Jesus Christ;
- Successor Of St. Peter, Prince Of The Apostles;
- Supreme Pontiff Of The Universal Church;
- Patriarch Of The West;
- Servant Of The Servants Of God;
- Primate Of Italy;
- Archbishop And Metropolitan Of The Roman Province;
- Sovereign Of Vatican City State.
The Wikipedia states:
The title 'Pope' is an informal one; the formal title of the Pope is 'Bishop of Rome, Vicar of Jesus Christ, Successor of the Prince of the Apostles, Supreme Pontiff of the Universal Church, Patriarch of the West, Primate of Italy, Archbishop and Metropolitan of the Roman Province, Sovereign of the State of the Vatican City, Servant of the Servants of God', although this is rarely seen or used in full...