Villa Les Bleuets, Villa in Prangins, canton Vaud, Switzerland.

Villa Les Bleuets is a 26-room mansion built in 1896 at Promenthoux, on the right bank of the Promenthouse delta where it meets Lake Geneva. Its main facade uses large translucent panels of Gustave Falconnier's glass brick, and five arcades above the lake serve as moorings. A semi-elliptical private harbour, 177 by 45 metres, extends from the property.

Villa Les Bleuets was built in 1896 by architect Stephen Sauvestre, designer of the Eiffel Tower, for the Parisian couturier Jean-Philippe Worth. The Nyon architect Gustave Falconnier directed the works and used his glass brick on the main facade. In 1925 the house passed to Henri Esders, owner of the Paris clothing stores on rue de Rivoli. A fire on 6 September 1950, under Count de Bendern, partly destroyed it and the roof was much simplified during rebuilding.

The house was built in 1896 for the Paris couturier Jean-Philippe Worth, and from 1948 it has also been called "château de Promenthoux". Its grounds and private harbour were listed as a Swiss cultural property of national importance after the 2018 purchase, and the whole ensemble has been a listed historic monument since February 2019. The villa appears in a scene of the 2011 film Belle du Seigneur.

The villa stands in the hamlet of Promenthoux, Prangins, on the right bank of the Promenthouse delta where it meets Lake Geneva. It is a private residence, so it is seen from the lake or the shore rather than visited inside. The five arcades above the water allow boats to moor.

The private harbor has a semi-elliptical shape and was an unusual engineering achievement when built. With its size, it remains one of the largest private harbors on Lake Geneva today.