The family mansion was built in 1850 in neo classical style. In 1904 the owner Cohn-Donnay, instructed Paul Hamesse , (architect 1877 - 1956) to restructure and redecorate his home to a comtemporary geometrical Art Nouveau style. 18 december 1981 after a thorough renovation and restauration the new owners of the "De Ultieme Hallucinatie" opened the doors.

The restaurant consists of three parts :

• in the front an Art Nouveau Empire style room with Greek motifs, brass work on the furniture and a gigantic white-flamed marble chimney.
• the middle part has ben influenced by the Art Nouveau style of the scottish artchitect Charles Rennie Mackintosh
• the former dining room rather refers to the French Art Nouveau this impression is enhanced by the wall cupboard with its half-rounded mirror and rough rock-cristals

The garden used to be where the tavern-brasserie is now. The moss and fern were replaced by a beautifull marble floor, while the rockwall -construction remained. The former greenhouse is now sheltering the bar. The furniture consists mainly of train benches, designed by Henry Vandevelde for the Belgian Railways in 1930.

The orangerie was erected in 1887 in neo classical style in a dome construction. The Jugendstil stained glass windows were added in 1904 It is now an ideal setting for conferences, meetings and diners. On the first floor conventions were held by a Jewish Loge, the Art Nouveau pulpit is reminding us of that period. For private parties with a large attendance, the club "Citizen Zeb" in the former horse-stables decorated in Barrococo-style, offers a nice and spacious envirement.