I agree; I'm sure that the wedding has/will make the Dutch Royals happier after the sad events (Prince Friso's death, Prince Bernhard's illness and Princess Beatrix's fall) that have happened this year.
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The church where the religious wedding will take place looks quite nice. I've found some photos of the church's interior, but I'm not entirely sure if it's the same church as the photo's caption reads "'Onze Lieve Vrouwe ten Hemelopneming' (Our Lady of the Assumption), commonly called Mariakerk with its stunning interior of brick ceilings, wall paintings, Stations of the Cross, altars and stained-glass windows". Although I'll post it here anyway:
the Netherlands - Apeldoorn, Mariakerk - a photo on Flickriver