St. Peter's Collegiate Church

To replace the Romanesque church of the Chapter of Canons, a collegiate church was built in Aire-sur-la-Lys in the 16th century. Construction on this building spanned nearly a century and a half. Built in the Flamboyant Gothic style, this impressive structure is primarily made of brick and stone.

Despite its considerable size, the tower collapsed shortly after construction was completed in 1624. It was not until 10 years later that the reconstruction was finally completed.

The collegiate church was subsequently severely damaged by the sieges it endured from 1641 to 1710. The transept, the chapter house, and some of the chapels were destroyed and burned. The vaults of the nave and the tower collapsed, and in 1944, the choir could not withstand the bombings.

Designated a historic monument in 1862, this building bears witness to numerous restorations, as evidenced by its various architectural styles. Indeed, on the ground floor, the nave, the choir, and the high vaults are still in the Gothic style with their ribbed vaults, while the upper floor and the decor reflect the passage of time, evolving into a classical and Baroque style.

In addition to its architectural splendor, the collegiate church features a rich collection of furnishings, such as an organ case dating from 1633, the statue of Our Lady of Panetière, who watches over the town with a protective eye, the rood screen, and the Chapel of the Blessed Sacrament with its Virgin and Child.