Great diversity evidently existed in the liturgies used in southern Gaul. Lack of documentation, however, makes it difficult to reconstruct some parts of the liturgy. By the ninth century, the Gallican liturgy had become fused with the Roman rite. The spread of Roman influence is clearly shown by early Gallican sources.
The evangelized tribes were, in many cases, nominal believers who retained many pagan customs. But, over time, churches took root and and Christianity thrived.
Irenaeus (c. 2nd century) was born somewhere in western Asia Minor, probably Smyrna. He studied religion and philosophy under Polycarp, the bishop of Smyrna.
Ambrose (c. 340-397) was the Bishop of Milan. He was born in Gaul or modern-day France.