The Stoclet Palace is a private mansion located in Brussels, Belgium, designed and built by the Viennese architect Josef Hoffmann for the wealthy industrialist Adolphe Stoclet between 1905 and 1911. The mansion is considered one of the most important examples of the Vienna Secession style, a form of Art Nouveau that originated in Vienna, Austria.

The exterior of the Stoclet Palace is characterized by clean lines and geometric shapes, while the interior is richly decorated with marble, precious woods, and mosaics. The palace features a variety of artistic styles, including Art Nouveau, Art Deco, and modernist elements.

The Stoclet Palace is renowned for its stunning mosaics, which were created by the Austrian artist Gustav Klimt and his protégé, Franz von Matsch. The most famous of these mosaics is "The Kiss", a romantic depiction of a couple locked in an embrace.

The Stoclet Palace was declared a UNESCO World Heritage Site in 2009, recognizing its outstanding artistic and architectural value. Today, the palace is still privately owned and not open to the public. However, it is occasionally open for special exhibitions and events.

The Stoclet Palace is considered a masterpiece of the Vienna Secession style and an important example of Art Nouveau architecture. Its richly decorated interior and stunning mosaics make it one of the most beautiful private mansions in the world.