It is the only cathedral I ever saw which also houses a restaurant with a theater and organizes expositions.
The Basilica sits on a hill and you can see from there whole Brussels.
Sitting on the steps we overlooked whole Brussels.
Photos I took from outside the church
and the inside
Here it goes to the restaurant and theatre
Looking down on Brussels
The restaurant and behind the theatre stage with the red curtain.
I haven't been there yet, but friends of mine have and they said it is really worthwhile to see a theatre play and the restaurant is very good too.
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You can read more here on my travel blog COUNTRIES & CITIES