🏛️ Aqueduc gallo-romain du Gier
Roman aqueduct spanning the Rhône Valley to supply Lugdunum (Lyon)
📌 Fast Facts
- Length: approximately 80 kilometers from the Gier River to Lugdunum (Lyon)
- Construction: 1st century AD
- Spans multiple communes: Brignais, Chaponost, Lyon, Sainte-Foy-lès-Lyon, Soucieu-en-Jarrest, and Mornant
- Engineering methods: gravity-fed system with tunnels, bridges, and siphons
The Aqueduc gallo-romain du Gier, also known as the Mont-Pilat Aqueduct, is a 1st-century Roman engineering structure that transported water across the Rhône Valley to the city of Lugdunum (modern-day Lyon). Built to maintain a constant gradient, the aqueduct relied on gravity to move water over its 80-kilometer length from springs near Saint-Chamond to the urban center. It ranks among the significant hydraulic works of Roman Gaul and demonstrates the technological capabilities of Roman civil ...