The Roman Empire was the geographical factor which first helped the spread of Christianity. It started in Judea, which was part of the Roman Empire. It was spread through this empire, especially its eastern part by Christian preachers. Originally the Christians were Jews who preached other Jews and followed Jewish law. Paul created a theology which opened Christianity to the gentiles (non-Jews) of the Roman Empire. He said that faith in Jesus and following his teaching was what was required for salvation. Therefore, you did not have to be a Jew or follow Jewish law to be a Christian. Christianity was endorsed by all but one of the emperors after Constantine the Great. This helped his spread. The co-emperors Gratian and Theodosius made mainstream Christianity (the Latin/Western Church and the Greek/eastern Church, which later came to be called Catholic and Orthodox respectively) the sole legitimate religion of the empire.
Probably the alps and the med. sea
The Roman Empire.
I donβt know
warm climate, fertile soils, and variety of natural resources
They helped natives learn Christianity
Kings and Monasteries helped to spread Christianity.
Paul
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.
Mountains.
Kings and Monasteries helped to spread Christianity.
Costantine
Emperor Constantine
Lutheran Christianity and Protestant Christianity.
clovis helped spread christianity by making it the only legal religion
Unlimited is the antonym of limited. Hope this helped. :)