The Pope, who is the leader of the world's Roman Catholics, lives at the Vatican City, so as this is in Rome, this particular branch of the universal/catholic Church is called the Roman Catholic Church (Catholic now with a capital 'C') because of its roots being in Rome. read more
Roman Catholic is a term sometimes used to differentiate members of the Catholic Church in full communion with the Pope in Rome from other Christians, especially those who also self-identify as "Catholic", such as Anglo-Catholics and Independent Catholics. read more
Within the Catholic Church there are a number of individual churches, sometimes called rites. One of these is the Roman rite or Roman church. It includes most of the Catholics in the Western world. A Roman Catholic is a Catholic who is a member of the Roman rite. There are many Catholics in the East who are not Roman Catholics, such as Maronite Catholics, Ukrainian Catholics, and Chaldean Catholics. read more