Église Saint-Martin

Église Saint-Martin is a Gothic church in Triel-sur-Seine featuring a choir section positioned above Galande Street, supported by stone vaults below. These vaults create a covered passageway that allows pedestrians to walk beneath the church structure.

Construction began during the reign of King Louis IX in the mid-13th century, built on foundations of an earlier religious building at the same location. The church thus represents a continuation of sacred use at this site across several centuries.

The church continues to serve as a place for worship and community gatherings, keeping local religious traditions alive for residents and visitors alike. It remains woven into the daily spiritual life of the town.

The church is open on Wednesdays and Saturdays during specific times for visitors to explore its architectural features and interior spaces. Comfortable walking shoes are recommended since you may visit both the main level and underground passages.

Hidden beneath the church lies a semicircular crypt reached through two underground doors or a spiral staircase that winds downward. Small round windows set into the stone walls cast soft light into this subterranean chamber.