Question

To where had Christianity spread by 476 AD? the west of Britain most of Africa most of the Roman Empire the southern part of Asia Minor

Answer 1

Based on the map I've attached, I'd say that Christianity spread to most of the Roman Empire by 476 AD. If you look at the map, you will see that before 325, there were some places in Spain and Italy mostly where Christianity existed, however, after that year, it only continued spreading throughout Europe, which mostly belonged to the Roman Empire at the time.