The historic, gothic basilica dates back to the 16th century. The most valuable monuments here include a gothic choir and a statue of Mary made of polychrome wood, from the 16th century. You can also see colorful gothic stained glass windows and a 17th-century pulpit. In 1247, the feast of Corpus Christi was celebrated here for the first time.
In the vault of the temple there is a crypt with a black marble tomb built in 1602 for Conrad de Gavre. Moreover, in the church there is a mausoleum of the 10th century bishop of Liege, Ewraker. According to the records of the chronicler Jan des Preis, he was to be the son of a Polish prince and a Saxon princess.
The church was built on the site of the 10th-century collegiate church, which burned down on the night of August 3–4, 1312. The conflict between local patricians and representatives of guilds and clergy escalated, as a result of which the then church was burned down along with the city officials sheltering in it.