The Roman Empire persecuted the Catholic church. When the Roman empire began it's downfall, the Catholic church began to gain more and more power. When the Roman empire finally fell, the Catholic church was the most powerful figure around. Many people seeked help from the church. Monks and Nuns educated the children and poor, hungry people were fed.
Just a little clarification. During the Roman empire there was no such thing as the Catholic Church. The religion was simply Christianity. Although initially there were many sects of Christianity, they finally united. It was not until the Protestant Revolt begun by Martin Luther that the denominations of Christianity came into existence, Catholic being one of them.
The Thirty Years' War brought about decline in power of the Catholic Church, decline in feudalism, decline in power of the Holy Roman Empire, and the rise in the Swedish Empire and Bourbon Dynasty.
APEX: The Islamic Empire directly governed the people it controlled, but the Roman Catholic Church relied only on its influence with rulers.
German princes gained independence.
The Roman Catholic church survived the fall of the Western Roman Empire. The Orthodox Church survived the fall of the Byzantine Empire.
The Catholic Church in the West and the Orthodox Church in the East
It is when The Roman Catholic Church and The Eastern Orthodox Church had The Great Schism, in which The Roman Catholic Church broke off The Orthodox Church.
Boadicea helped with the decline of the Roman Empire.
Decline in the power of the Roman Catholic Church.
decline in the power of the roman catholic church
The seat of power of the Catholic Church is the Vatican. This is a very small area in the centre of Rome (which comprises the Basilica of St Peter's, several buildings and a big garden) and is an independent city-state.
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.
Simply, the Roman Empire divided into the Western Roman Empire (based in Rome) and the Easter Roman Empire (based in Constantinople). Once the western empire fell, the Eastern Orthodox and Roman Catholic churches diverged and evolved in isolation. The full history is significantly more complex, but that is the answer in a nut-shell.