We really do not know why Jesus Christ chose Simon whom He renamed the Rock (Peter) to be the first leader of His Church on Earth. John 21:15-17 states: When they had finished breakfast, Jesus said to Simon Peter, "Simon, son of John, do you love me more than these?" He said to him, "Yes, Lord, you know that I love you." He said to him, "Feed my lambs." He then said to him a second time, "Simon, son of John, do you love me?" He said to him, "Yes, Lord, you know that I love you." He said to him, "Tend my sheep." He said to him the third time, "Simon, son of John, do you love me?" Peter was distressed that he had said to him a third time, "Do you love me?" and he said to him, "Lord, you know everything; you know that I love you." (Jesus) said to him, "Feed my sheep. Matthew 16:17-19 states: Jesus said to him in reply, "Blessed are you, Simon son of Jonah. For flesh and blood has not revealed this to you, but my heavenly Father. And so I say to you, you are Peter, and upon this rock I will build my church, and the gates of the netherworld shall not prevail against it. I will give you the keys to the kingdom of heaven. Whatever you bind on earth shall be bound in heaven; and whatever you loose on earth shall be loosed in heaven." The Catholic Church believes the Lord made Simon alone, whom he named Peter, the "rock" of his Church. He gave him the keys of his Church and instituted him shepherd of the whole flock. The Pope is the senior pastor of 1.1 billion Catholic Christians, the direct successor of Simon Peter. The Pope's main roles include teaching, sanctifying, and governing. For more information, see the Catechism of the Catholic Church, section 880-882.
Pope Paul VI was elected pope after the death of Pope John XXIII.
John Paul II
There is no pope named Pope XXIII. If you are referring to Pope John XXIII, he became pope in 1958.
Pope Francis is the reigning pope in 2013.
The current pope is Pope Benedict XVI.
Pope Pius III was the predecessor of Pope Julius II.
Pope Benedict followed Pope John Paul II as pope.
It was Pius XII. He was pope from Mar. 2, 1939 to his death on Oct. 9, 1958.
Pope Pius I was the 10th pope.
12 popes have taken the name "Pius". Some of them were also canonized as saints. Pope Pius I, saint, Pope 140/142 to 155 Pope Pius II, Pope 1458 to 1474 Pope Pius III, Pope in 1503 Pope Pius IV, Pope 1559 to 1565 Pope Pius V, saint, Pope 1566 to 1572 Pope Pius VI, Pope 1775 to 1799 Pope Pius VII, Pope 1800 to 1823 Pope Pius VIII, Pope 1829 to 1830 Pope Pius IX, Pope 1846 to 1878 Pope Pius X, saint, Pope 1903 to 1914 Pope Pius XI, Pope 1922 to 1939 Pope Pius XII, Pope 1939 to 1958
Pope Benedict XVI was the 265th pope.
Pope Francis is pope number 266.