| Château d'Ouchy | |
|---|---|
The Château d'Ouchy in 2019 | |
![]() Interactive map of the Château d'Ouchy area | |
| General information | |
| Location | Lausanne,Switzerland, Place du Port 2, 1006 Lausanne |
| Owner | Sandoz Family Foundation |
| Technical details | |
| Floor count | 7 |
| Design and construction | |
| Architect | Francis Isoz |
| Other information | |
| Number of rooms | 50 |
| Number of restaurants | 1 |
| Website | |
| Official website | |
TheChâteau d'Ouchy (Castle of Ouchy) is a hotel built on the site of an old medieval castle inLausanne,Switzerland byJean-Jacques Mercier between 1889 and 1893. It belongs to the hotel division of theSandoz Family Foundation.

It was first constructed by the Bishop of Lausanne as a tower on the banks ofLake Léman around 1170. A century later, it was rebuilt and transformed into a fortified residence for bishops, particularly forGuillaume de Varax. It was also used as prison. The castle was abandoned and its tower reduced to ashes in 1609. The canton ofVaud recovered it after the departure of the Berneses and sold off part of the land to Jean-Jacques Mercier in 1885. The new owner radically transformed the castle by demolishing the ruins and old buildings, leaving only the tower.[1]
The castle was rebuilt in the neo-gothic style between 1889 and 1893 and converted into a hotel.[2]
According toJoseph Grew many of the leading figures of theTreaty of Lausanne were staying at the hotel and there is aplaque of the 1923 Treaty of Lausanne at the Château d'Ouchy commemorating the peace treaty.[3]
46°30′24″N6°37′39″E / 46.5068°N 6.6274°E /46.5068; 6.6274