Lille Cathedral (Basilique-Cathédrale Notre-Dame-de-la-Treille)

Lille Cathedral (Basilique-Cathédrale Notre-Dame-de-la-Treille) blends neo-Gothic ambition with striking modern additions. Begun in the 19th century and completed in the 1990s, it’s best known for its translucent marble-and-resin west façade that bathes the nave in soft light. Inside, discover contemporary stained glass, a notable organ, and the Treille icon—an object of local devotion. The site anchors the Old Lille district, making it easy to pair with nearby streets and museums. Visit for its unusual marriage of historic intent and modern design, quiet ambience, and insight into Lille’s evolving architectural identity. Free entry; check hours.