His Holiness, the Pope.
Roman Catholic AnswerThe titles of the popes are numerous, historically and theologically significant:1- Bishop of Rome
2- Vicar of Jesus Christ
3- Successor of the Chief of the Apostles
4- Supreme pontiff of the Universal Church
5- Patriarch of the West
7- Archibishop and metropolitan of the Roman Province
See the link below for a full description of each
The leader of the Jewish faith is called Rabbi.
The pope in Rome is the leader of the entire Catholic Church.
The Catholic Church did not exist in 4 BC.
The Roman Catholic Church
The pope is the leader of the catholic Church on earth.
The leader of the Catholic Church is called the Pope. The Pope is traditionally the bishop of Rome, however during the Middle Ages some Popes ruled the Church from France.
The Pope is the temporal leader of the Catholic Church, and a Bishop has power over a small portion of the world [called a Diocese], but he must ultimately answer to the Pope.
Pope Francis is the supreme leader of the Catholic Church.
The leader of the Catholic Church is the pope. Today (2011) that is Pope Benedict XVI.
The curia is the Pope's group of advisers. The Pope is the leader of the Catholic Church.
The pope in Rome, today that would be Pope Benedict XVI, is the leader of the ENTIRE Catholic Church, even in Russia.
As of March 2013, Pope Francis is the leader of the Catholic Church.