The Anglo-Saxons were pagans when they first came to Britain.
This means that they worshipped lots of different gods and buried many treasures with their dead.
The days of the week are named after early Anglo-Saxon Gods:
In AD597 the Pope in Rome sent a missionary called Augustine to England to convert the Anglo-Saxons to Christianity.
King Ethelbert of Kent allowed him to build a church in Canterbury.
Christianity then spread to other parts of Britain and churches, usually built of wood alongside existing watchtowers, were built in Anglo-Saxon villages all over Britain under the Pope's orders.
Christians only followed one God and believed in peace.
As Anglo-Saxons were converted from pagan beliefs to Christian ones, they changed their way of life and became less warlike.