The Romans did not help spread Christianity. It was the other way round. Christianity was spread around the Roman Empire by the apostles, other missionaries and the clergy (when Christianity developed its churches). Christianity started in Judea, which was part of the Roman province of Syria; that is, it was part of the Roman Empire. It became widespread by the third century. It was persecuted several times. There were alternations of periods of toleration and periods of persecution. Then in the early fourth century, the emperor Constantine the Great promoted Christians in the imperial bureaucracy, tried to arbitrate between opposing Christian doctrines and built a number of important Christian Churches. In 380 mainstream Christianity was made state religion the sole legitimate religion and dissident Christian doctrines were branded as heretic and banned.
It can be said that Christianity is one of the main legacies of the Romans. It developed from a religion among a small group of Jews into a mass religion in the Roman days. It spread around the Roman Empire. It became the religion of the masses and then state religion. Catholic Christianity and Orthodox Christianity developed during the Late Roman Empire. They were originally called Latin or Western Christianity and Greek or Eastern Christianity respectively. The former was the main religion in the western part of the Roman Empire and the latter was the main religion in the eastern part of the Roman Empire.
The further spread of Catholicism in Western Europe was promoted later by Charlemagne the king of the Franks when he developed the Carolingian Empire. The further spread of Orthodox Christianity was spread in eastern Europe by Greek missionaries and particularly by Photios, Patriarch of Constantinople, and the adoption of this religion in Russia by Vladimir the Great, the grand prince of Kiev.
They built the Vatican.
Kings and Monasteries helped to spread Christianity.
No, Christianity wasn't invented by Romans. It was sent to Jesus by God and Jeasus spread Christianity.
Paul of Tarsus, who was previously known as Saul spread Christianity as the first Christian missionary, or person who spreads their belief to non-believers. He travelled across the Roman Empire, sending Christian messages to gentiles and non-Jewish communities as well as to Jews. This allowed more people to follow the faith. He preached about Christianity in new areas where no one had preached before, and established Christianity there.
Paul
clovis helped spread christianity by making it the only legal religion
Nothing happened to them. These gods were beliefs, not material beings. Belief in these gods decreased as Christianity spread.
Kings and Monasteries helped to spread Christianity.
Charlemagne helped spread Christianity throughout the Frankish Empire and the lands he conquered. He spread Christianity through both peaceful conversion efforts and military conquests.
The apostles of Jesus Christ help spread what was later called Christianity. At first people such as the Romans and others considered the apostles and what they taught to be a Jewish sect. By the end of the 1st century it was clear that it was not a sect, but a different religion.
The spread of Christianity was possible because of stability and unification of Mediterranean achieved by Romans.
Saul of Taurus, who converted on the road to Damascus, and became St. Paul. He was arrested by the Romans and was executed (by beheading) in Rome.