The head of the Roman Catholic Church is called the Pope.
Sanctuary
Excommunicated
Pope
At the time of the Roman Empire the church of the eastern part of the empire was called Eastern or Greek. Later it came to be called Orthodox.
The correct name of the popularly called Catholic Church is The Holy Roman Church. The word "Catholic" is not a part of its official name.
Church of England
Roman institutions eventually collapsed. The institution which survived and grew stronger was the Latin Church, which later came to be called the Roman Catholic Church.
It was the Greek/Eastern Church. Later it came to be called as the Orthodox Church.
Roman Catholicism.
It is the bishop who is only called by this.
heresy