The Stoclet Palace (, ) is a mansion in Brussels, Belgium. It was designed by the Austrian architect Josef Hoffmann for the Belgian financier Adolphe Stoclet. Built between 1905 and 1911 in the Vienna Secession style, it is located at 279–281, Avenue de Tervueren/Tervurenlaan, in the Woluwe-Saint-Pierre municipality of Brussels. Considered Hoffman's masterpiece, the residence is one of the 20th century's most refined and luxurious private houses. The sumptuous dining and music rooms of the Stoclet Palace exemplified the theatrical spaces of the Gesamtkunstwerk ("total work of art"), celebrating sight, sound, and taste in a symphony of sensual harmonies that paralleled the operas of Richard Wagner, from whom the concept originated. In his designs for the Stoclet Palace, Hoffmann was particularly attuned to fashion and to the Viennese identity of the new style of interior, even designing a dress for Madame Stoclet so that she would not clash with her living room decor as she had while wearing a French Paul Poiret gown. The mansion is owned by the Stoclet family and is not open to visitors. Until recently no outsider, not even experts helping with restoration were allowed in. The building has received protected status by the Monuments and Sites Directorate of the Brussels-Capital Region, and it was designated as a World Heritage Site by UNESCO in June 2009. Description The Stoclet Palace was commissioned by Adolphe Stoclet (1871–1949), a wealthy Belgian financier and art collector. He chose 35-year-old Austrian architect Josef Hoffmann (1870–1956), who was a founding member of the Vienna Secession, a radical group of designers and artists established in 1897. Hoffman abandoned fashions and styles of the past and produced a building that is an asymmetrical compilation of rectangular blocks, underlined by exaggerated lines and corners. The starkness of the exterior is softened by artistic windows, which break through the line of the eaves, the rooftop conservatory, and bronze sculptures of four nude males by Franz Metzner, which are mounted on the tower that rises above the stairwell. Regimented upright balustrades line the balconies, touched with Art Nouveau ornamentation. The Stoclet Palace was the first residential project for the Wiener Werkstätte (Vienna Workshops), co-founded by Hoffman in 1903. Josef Hoffman and his colleagues designed every aspect of the mansion, down to the door handles and light fittings. The interior is as austere and at the same time detailed as the exterior, with upright geometrically coordinated furniture