🏛️ Aqueduc gallo-romain du Gier
Ancient Roman aqueduct spanning 80 km across the Lyon region
📌 Fast Facts
- Constructed between 19 BC and 10 AD during Emperor Augustus's reign
- Approximately 80 kilometres long, supplying water to Lugdunum (Lyon)
- Included bridges, tunnels, and siphons using gravity-fed engineering
- Remains visible across communes including Brignais, Chaponost, Sainte-Foy-lès-Lyon, Mornant, and Soucieu-en-Jarrest
The Aqueduc gallo-romain du Gier, also known as the Mont-Pilat aqueduct, was a major Roman hydraulic infrastructure project that transported water from the Gier River near Saint-Chamond to the city of Lugdunum (Lyon). Built between 19 BC and 10 AD, it is among the most significant engineering accomplishments of Roman Gaul. The system delivered water across complex terrain using gravity alone, following hillside contours to minimize extensive earthworks ...