Sainte-Foy Fort, Military fort in Sainte-Foy-lès-Lyon, France.

Sainte-Foy Fort is a stone-built work of Lyon's first defensive ring, measuring 300 by 200 metres and overlooking the Saône. Its main gate faces Lyon across a deep moat crossed by a drawbridge. Inside are a powder magazine holding 44 tonnes of powder, a kitchen, a laundry, stores and a latrine in the courtyard. The facade carries the lettering "COMPAGNIE REPUBLICAINE DE SECURITE N° 46" beneath five round-arched openings.

Built in 1843 as part of Lyon's first defensive ring, the fort overlooks the Saône from a 300 by 200 metre perimeter. Its main gate faces Lyon across a deep moat crossed by a drawbridge. On 24 August 1944, during Operation Dragoon, the Kommandant Heeresgebiet Südfrankreich withdrew into the fort.

The fort itself remains a gendarmerie-style base: the Compagnie Républicaine de Sécurité 46 has occupied it since 1949, and its name is spelled out in dark metal letters above the round-arched gate. Only the fort's glacis, the outer slope, was sold to the municipality of Sainte-Foy-lès-Lyon to create Marius-Bourrat Park. The fort's outlying lunette, privately owned, now holds an indoor tennis court.

The site is accessible today mainly as a public park and is best reached on foot. Visitors should know that parts of the grounds remain in operational use by security forces.

The fort featured a sophisticated water system with two wells and an underground cistern that collected rainwater to sustain its garrison. This self-sufficient water supply was crucial for long-term survival during a siege.