Vaison-la-Romaine is a commune

Communes of France

The commune is the lowest level of administrative division in the French Republic. French communes are roughly equivalent to incorporated municipalities or villages in the United States or Gemeinden in Germany...

 in the Vaucluse

Vaucluse

The Vaucluse is a department in the southeast of France, named after the famous spring, the Fontaine-de-Vaucluse.- History :Vaucluse was created on 12 August 1793 out of parts of the departments of Bouches-du-Rhône, Drôme, and Basses-Alpes...

 department in the Provence-Alpes-Côte d'Azur

Provence-Alpes-Côte d'Azur

Provence-Alpes-Côte d'Azur or PACA is one of the 27 regions of France.It is made up of:* the former French province of Provence* the former papal territory of Avignon, known as Comtat Venaissin...

 region

Régions of France

France is divided into 27 administrative regions , 22 of which are in Metropolitan France, and five of which are overseas. Corsica is a territorial collectivity , but is considered a region in mainstream usage, and is even shown as such on the INSEE website...

 in southeastern France

France

The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...

.

The historic section is in two parts, the Colline du Château on a height on one side of the Ouvèze

Ouvèze

The Ouvèze is river in southern France, left tributary of the Rhône. It rises in the southern French Prealps , in the commune of Montauban-sur-l'Ouvèze...

, the "upper city" and on the opposite bank, the "lower city" centered on the Colline de la Villasse.
The area was inhabited in the Bronze Age

Bronze Age

The Bronze Age is a period characterized by the use of copper and its alloy bronze as the chief hard materials in the manufacture of some implements and weapons. Chronologically, it stands between the Stone Age and Iron Age...

. At the end of the fourth century BCE, the upper city of Vaison became the capital of a Celtic tribe, the Vocontii

Vocontii

The Vocontii were a Gallic people who lived on the east bank of the Rhône.-Location:Their main towns were Lucus Augusti and Vasio , but they occupied an extensive territory stretching from Vercors in the north, the buttresses of Mont Ventoux in the south-west, Manosque in the south-east and...

 or Voconces.