Location
Ambrussum, or its alternative spelling of Ambrusium, is mentioned as a staging post (mutatio) on the Antonine Itinerary of AD 200, on pilgrims' guide on the route to the Holy Land of AD 333 and on the Peutinger map of 1520. All place it midway between Nimes (Nemausis) and Castelnau-le-Lez (Sextantio), that is 22 kilometres (14 mi) from each.
The Via Domitia linked the Alps with the Pyrenees, and is the oldest Roman Road in Gaul, more specifically Gallia Narbonensis in France. It was laid out by Cneius Domitius Ahenobarbus around 120 BCE, it was to become part of the roads that linked Italy with Cadiz in Spain. At Ambussum the Via Domitia crosses the Vidourle, and the settlement provided a staging point on this road. Directly adjacent to the site, the modern A9 autoroute, the Languedocienne crosses the Vidourle and at this point there is the modern day equivalent of a mutatio, the Aire de service de Lunel. The site is reached through the village of Villetelle.
The bridge is 20 m above sea level, and the highest point of the oppidum is 58 m. When in spate the Vidourle will rise by 8 m. From the highest point, the Oppidum de Nages is easily seen. Further one can see Mont Ventoux, Pic Saint-Loup, and the hills of the Cevennes including the Causse du Larzac and Mont Aigoual.
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