Château Saint-Léon is a former castle in the center of Eguisheim. The castle was built by the Counts of Eguisheim and taken over by the Bishop of Strasbourg during the 13th century. An episcopal bailiff occupied it until the French Revolution (1789). The enceinte was surrounded by a moat which was filled in by the 18th century. Houses built in the castle courtyard and against its walls were destroyed by a fire in 1877 which also damaged the castle - it was left in runs for many years.
In 1885, it was bought by the Bishop of Strasbourg through the mediation of a M. Stumpf who wanted to build a chapel dedicated to Saint Leo. The remains of the keep were destroyed and the chapel built in its place, the works being carried out by the architect of historic monuments, Charles Winkler. The chapel was completed in 1895. Winkler also restored the residence at the south of the site which had been rebuilt, with mullioned windows in the 16th century. He added a staircase turret and a neo-Renaissance balcony.
References:Doune Castle was originally built in the thirteenth century, then probably damaged in the Scottish Wars of Independence, before being rebuilt in its present form in the late 14th century by Robert Stewart, Duke of Albany (c. 1340–1420), the son of King Robert II of Scots, and Regent of Scotland from 1388 until his death. Duke Robert"s stronghold has survived relatively unchanged and complete, and the whole castle was traditionally thought of as the result of a single period of construction at this time. The castle passed to the crown in 1425, when Albany"s son was executed, and was used as a royal hunting lodge and dower house.
In the later 16th century, Doune became the property of the Earls of Moray. The castle saw military action during the Wars of the Three Kingdoms and Glencairn"s rising in the mid-17th century, and during the Jacobite risings of the late 17th century and 18th century.