- Around 3000 BC–Final Neolithic – Ferrières culture: first occupation of the site
- Around 300 BC: Creation of the Oppidum
- Around 250 BC. : Settlement and cemetery near the Vidourle river
- In 120 BC. : Construction of the Via Domitia and beginning of the conquest of Gaul
- Around 30 BC: Creation of the staging post and construction of the bridge
- Around 100 AD: Abandonment of the Oppidum and of the sacred site near the Vidourle
- From 175 to 250 AD: Phasing out of the staging post, progressive abandonment of the urban roads
- Shortly after 400 AD: Ambrussum is entirely inhabited
- 1620: first known depiction of the bridge (with 4 arches) by Anne de Rulman
- November 18th 1745: an arch of the bridge collapses after one of the Vidourle floods
- 1840: the bridge is classified as a "Historic Monument"
- September 27th 1933: the penultimate arch of the bridge collapses after one of the Vidourle floods
- 1857: Gustave Courbet paints The Ambroix bridge
- 1974: The ramparts are classified "Historic Monument"
Guided visits are available at 3pm every Saturdays and Sundays without booking (on pre-booking only for the other days or time according to our availability).
Site Museum visit: