Château de Bonnefontaine is a château in Altwiller in the department of Bas-Rhin, France. It was completed between 1818 and 1822. Its neo-classical Palladian portico is decorated with sphinxes. The mineral water spring was discovered in 1603. This gave the idea in 1816 to a banker from Basel to build a

thermal spa A spa is a location where mineral-rich spring water (and sometimes seawater) is used to give medicinal baths. Spa towns or spa resorts (including hot springs resorts) typically offer various health treatments, which are also known as balneothe ...

with castle, park and dance hall, since destroyed. The banker sold the estate in 1836. Since 1878 it has been owned by the Schlumberger family. It became a listed ''

monument historique ''Monument historique'' () is a designation given to some national heritage sites in France. It may also refer to the state procedure in France by which National Heritage protection is extended to a building, a specific part of a building, a coll ...

'' in 1991.

References

Châteaux in Bas-Rhin Monuments historiques of Bas-Rhin Houses completed in 1822 1822 establishments in France {{Alsace-castle-stub