The collegiate church is listed as historic monument since 1963. The history says Pépin le Bref might be buried under the former church.
The crypt is a magnificent example of the carolingian architecture.
The Collegiate church is opened all year long.If you want to visit it you have to ask the keys of the church at the Val d'Ardenne Tourist Information Centre (Vireux-Wallerand) - Place du château.
Note :
Opening hours of the Tourist Information Centre:
April to September: daily from 10am to 12pm and from 1pm to 6pm.
From October to March: Monday to Friday from 10am to 12pm and from 1pm to 5pm, Saturday from 1pm to 5pm, closed on Sunday.