The Apostle Paul spread Christianity throughout the Mediterranean regionSaint Patrick spread Christianity throughout Ireland!
The apostle responsible for spreading Christianity among the Jews was Paul.
Many cultures are responsible for the spreading of Christianity. The main culture which spread it was certainly the Roman Empire.
No culture is 'responsible' for Christianity. Christianity is based on the death, burial and resurrection of Jesus Christ.
Bloodshed.
Spreading Christianity
I believe that this would be Paul. Because of his insistance in preaching the gospel, and even though he was a Roman citizen he was put to death.
The apostles, particularly Peter and Paul, played significant roles in spreading the Christian faith after the death of Jesus. They traveled to different regions, preached the teachings of Jesus, and established communities of believers. Their efforts were instrumental in the early expansion of Christianity.
He preached Christianity to the heathens in Ireland.
Sunni Ali and Mansa Musa
Johann Gutenberg was the person instrumental in spreading the ideas of the Renaissance beyond Italy. He introduced printing to Europe.
Monks were responsible for spreading the gospel from Ireland north to the Faroe Islands and Iceland. Also the gospel was first taken to China by monks from Europe. So they had quite a big role in the spreading of Christianity.
Jacques Cartier