By the third century, there were Christians in Arabia, and the conversion of King Tiridates helped to bring the faith to Armenia.
The third century saw a movement of Christianity into North Africa, which produced such Christian leaders as Cyprian, Tertullian, and Augustine. Carthage remained a strong center for Christianity for centuries, until it was eradicated from the area by Islamic invaders in the early 700's.
The third century also saw growth and consolidation of the church in Jerusalem, Antioch, and Corinth as missionaries took the faith to new areas within the empire.
The church at Rome, closely associated with the apostles Paul and Peter in New Testament times, was growing to become a focal point for Christianity by the third century, moving also into northern Italy. Gaul, which is now France, received the faith through Greek colonists. Early Gallic centers of Christianity included Vienne and Lyons. By the third century, too, there was a lot of Christian activity in Spain, particularly in the southern part of the country.
Ulfilas was a Christian evangelist to the Goths. Not only did he preach to the barbarians, but he also provided them with a Bible in their own language.
Christianity had spread to the limits of the known world.