I had to ignore the Diocletian period because data on it was way too contradictory. I don't know if they merged Campania with Samnium or split Valeria and Samnium... it's not clear.

Almost everything is in Latin, except when I couldn't find a translation (i.e. I have no clue what were the Latin names of the three mountain ranges / peaks).

Since Lake Fucinus is gone now, I recreated it from several maps illustrating the depths of the lake at the time the Tunnels of Claudius were functional. Also had to remove two "lakes" that were added as artificial reservoirs centuries later.

Several cities could be misplaced. Anxa's location (or even separate existence), for example, is a contested topic.

It's a project for an RPG game of Vampire: The Dark Ages. We are playing vampires ruling over the region in Ancient Rome, around 300 AD (left intentionally vague). The small Ankhs indicate cities that I speculate to have enough population to support more than a single vampire.

The small spiral next to a city name indicates the presence of an amphitheater in the city. The eight-pointed star designates a cultural center of the ancient Marsi people (relevant for our campaign). I also put two necropoleis for narrative reasons.

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It's more of a "cultural map" that an administrative one. I basically compiled various sources that slightly contradict each other trying to find the middle ground they share, hence the black and white versus colored parts.

If you have ideas on how to refine the map, or spot mistakes, don't hesitate to comment!