Spreading christianity

So the people of Rome became Christian because there ruler was Christian and he wanted everyone to be Christian so they became Christian. So one day the Pope went out on a walk to the marketplace. Then he saw a few boys for sale as slaves. They had blond hair and very white skin. The pope asked the guy who was selling them "where did these boys come from?" They came from the island of Britain said the man. So he asked the boys what are you guys called. We are Angles. Said the boys. He laughed and said you look more like angels. So he took the boys back home to where they lived and he found the ruler of the Anglo-Saxons and asked him if we could spread Christianity to the land. He said they could if they stayed in a place and didn't cause trouble. So they built monasteries and other churches and they began to teach the people Christianity. They followed them and they became Christian.