Crypt of Boulogne-sur-Mer

Developed in the nineteenth century around the remains of the Romanesque crypt, the Crypt of the Basilica of Notre-Dame is an astonishing maze of rooms and galleries extending beneath the entire surface of the Basilica.
A Historical Monument with mural-covered walls, it is also a museum space offering a treasury of sacred art and a lapidary collection.
The largest crypt in France, this is a magnificent testimony to 2,000 years of history!

Lose no time in discovering the breathtaking atmosphere, the exceptional historical remains and the priceless collections held in the Crypt.

The official mobile app offers access not only to practical information ahead of your visit, but also to exhaustive and detailed notices, in audio and/or read mode, on sixty or so points of interest encompassing the architecture, archaeology, murals, the lapidary collection and the treasury, accessible as a free or themed visitor pathway.

To explore at home or on-the-spot in the Crypt!

A French version of this app is also available.