List of Late Roman provinces
This article presents a list of Roman provinces in the Late Roman Empire, as found in the Notitia Dignitatum. == Praetorian prefecture of Gauls == In Latin, Gallia was also sometimes used as a general term for all Celtic peoples and their territories, such as all Brythons, including Germanic and Iberian provinces that also had a population with a Celtic culture.
Source: Wikipedia — List of Late Roman provinces (CC BY-SA 4.0)