How Christianity survived the Romans' departure

Christianity survived the departure of the Romans in the places where the Anglo-Saxons did not settle. The main centre of this survival was Ireland, where Christianity grew more popular throughout the 5th century. The importance of monasteries meant that Christianity flourished in Ireland. The work of missionaries meant that Ireland began to spread Christianity to other places in the 6th century. A good explanation of why Christianity survived the Romans' departure will use knowledge from across this unit.