The Royale Belge former headquarters is a functionalist building from 1967 to 1970, located in Watermael-Boitsfort, a municipality of Brussels, Belgium.. Construction began on 4 April 1967, followed by formal inauguration on 25 June 1970.

[2] To avoid drastic transformations, the Brussels-Capital Region's government placed the building on its safeguarding list, after which the Americans abandoned the project.

[3] In 2023, the Royale Belge was renovated by the British architectural firm Caruso St John and the Antwerp-based Bovenbouw architectuur.

The cross-shaped design is by the architects René Stapels and Pierre Dufau, who were inspired, among other things, by Eero Saarinen's John Deere World Headquarters (Moline, Illinois).

Thanks to the landscape architects Jean Delogne and Claude Rebold, the whole is harmoniously planted between ponds and greenery.