Collegiate Church of Saint-Pierre (Lille)
Lille, France
The Collegiate Church of Saint-Pierre (Collégiale Saint-Pierre) was once a large church located in Vieux-Lille, and for almost 750 years it set the pace for Lille's religious life. Seriously damaged during the Austrian siege of 1792, its destruction began in 1794. Its crypt, the only remaining vestige, was listed as a historic monument in 1971.
Church data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).