Considering the Mercure Paris Villepinte Parc des Expositions Paris in Paris?
A VT member wrote the following comment about visiting Paris:
Cathedral inside by bugulma
Interior of the cathedral is fantastic. Stained-glass window is fantastic and I was struck by its seize. I read it's the biggest window in France. The national cathedral must have the biggest one. Another interesting thing inside is frescoes on the walls around altar.