MIX – the former Royale Belge

The perfectly cross-shaped building in Corten steel with a fully glazed base gives the impression that the structure floats on the water. The architects designed a building in close relationship to its surrounding landscape. The iconic office building was renovated by Caruso St John Architects, Bovenbouw Architectuur, in collaboration with DDS+.

A large part of the building was renamed MIX and totally lives up to its new name! You will find a four-star hotel with 140 rooms and 40 studios, a large gym and wellness with 2 swimming pools, a co-working space, 3 restaurants and meeting and event rooms.

The interior design was entrusted to L’Atelier Lionel Jadot. Jadot engaged no fewer than 52 other designers for this project. He worked together with many designers working at Zaventem Ateliers and invited other Belgian and international designers to create an inspiring whole.

In this way, this iconic building was given a new life…worth discovering!

Practical information

Vorstlaan 25 Boulevard du Souverain – 1170 Watermael-Boisfort / Watermaal – Bosvoorde

Group : max 15 pers (max. 3 groups simultaneously)

Duration : 1h15min

Price per guide :

  • 130 € during office hours (the tour ends before 6pm)
  • 150 € during the weekend or on bank holidays
  • 180 € after 6pm


  • Monday until Sunday
  • from 10am
  • Only on demand at least 3 weeks before the tour



In collaboration with