The pope, also known as supreme pontiff or Roman pontiff, is the bishop of Rome, head of the worldwide Catholic Church and head of state or sovereign of the Vatican City State.

What does it mean to call someone a pope?

(in the early Christian church) a bishop. a person considered as having or assuming authority or a position similar to that of the Roman Catholic pope.

What is written on the Pope?

In The United States in the Light of Prophecy, he wrote: "The pope wears upon his pontifical crown in jeweled letters, this title: 'Vicarius Filii Dei', 'Viceregent of the Son of God'; the numerical value of which title is just six hundred and sixty-six.