The term Holy Roman Church refers strictly to the Church of Rome, the Diocese of Rome, the Holy See or the Apostolic See — they are all one and the same in this context. The incumbent is the Bishop of Rome — the Pope. The Holy Roman Church should not be confused with the Roman Catholic Church even though both are ruled by the Roman Pontiff as the visible head of the church. It has been used in this sense even by Popes. While the term "Roman Catholic Church" does appear with this meaning in official documents of the Church in question, the term "Catholic Church" is used much more frequently.