How did Christianity spread all over Europe?

Answer 1

Your first answerer notwithstanding, the Christian movement spread by word by others who were already converted. God made sure of that. The Apostle Paul was the Apostle to the Gentiles, and I put a lot of credit to him for being the messenger for Christianity. Sure, the other Apostles had some influence, but Paul seems to have been more dedicated to that cause.

And so the word spread throught the religion, later to be 'Cannonized' by Constantine at the council of Nicea.

What followed was the worst time in Christian history, where even those who attested to believing in God's word were persecuted by an 'official church' that mantained that all must come under the umbella of Roman Catholicism.

I would recommend reading Foxe's Book of Martyrs in order to be exposed to those times.

Answer 2

The Apostle Paul preached for Christ throughout the Roman Empire on three missionary journeys.

Answer 3

The first christian in Europe was a woman. Her name was Lydia in the town Phillipe in Greece.
See acts.

Answer 4

At first Torture and Scare Tactics. Then somebody with a brain came along, namely Martin Luther and cut the Vatican's tactics in half.

Answer 5

It's called Christianization:

http://en.wikipedia.org/wiki/Christianization

Christians would go around and introduce Christianity to People.

Answer 6

Convert local king, and get the king to convert his people (by the sword if necessary).

If not the king, then convert the queen, get her to convert the king, then get the king to convert his people (by the sowrd if necessary).

Answer 7

ol' paul had his missionary journeys and his acquaintances helped him too

Answer 8

Basically "believe in god or we'll torture you".

What a lovely religion.