Basilique Notre-Dame de Boulogne & the Walled Haute-Ville
Boulogne's medieval upper town sits behind one of the best-preserved sets of 13th-century ramparts in northern France, a complete circuit of walls you can walk in under 30 minutes. At its heart, the vast domed Basilica shelters a venerated Black Madonna that has drawn pilgrims for centuries.
Walking the Ramparts
The four-kilometre wall-walk circles the entire Haute-Ville and gives you rooftop-level views over the lower town, the port and, on a clear day, the white cliffs of the English coast across the Channel.
Entry is free and the path is open all day; pick up the circuit at the Porte des Dunes on the western side and follow the grassy chemin de ronde past 17 towers, each with its own name and story.
Inside the Basilica
Completed in 1866 after 40 years of construction, the Basilique Notre-Dame is the largest neo-classical church in France and its copper-green dome is visible from 30 km out at sea.
Descend into the vast crypt — one of the largest in France — to see the original Romanesque foundations and the gilded statue of Our Lady of Boulogne, still carried through the streets every August during the Grande Procession.
Stained-glass light, cool stone and near-silence make this one of the most atmospheric stops in the Pas-de-Calais.
The Haute-Ville Streets
Cobbled streets like the Grand'Rue and the Rue de Lille are lined with 18th-century townhouses, independent galleries and quiet café terraces — a world away from the busy port below.
Don't miss the ornate Hôtel de Ville and its distinctive 13th-century belfry, a UNESCO-listed landmark shared symbolically with the town's Flemish heritage.
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