Nyon Castle is first mentioned in 1272, but probably dates back to the Lords of Prangins. It was rebuilt by Ludwig I of Savoy. The rectangular building was built in a variety of building styles. In 1463, it was extensively rebuilt. Following the Swiss Confederation invasion of Vaud in 1530, the Bernese bailiff was at Nyon. In 1574-80 the castle was converted into the seat of the bailiff. It remained the seat of the bailiff and was renovated several times in the following centuries.
Today Nyon Castle is a museum.
References:The Château du Lude is one of the many great châteaux of the Loire Valley in France. Le Lude is the most northerly château of the Loire Valley and one of the last important historic castles in France, still inhabited by the same family for the last 260 years. The château is testimony to four centuries of French architecture, as a stronghold transformed into an elegant house during the Renaissance and the 18th century. The monument is located in the valley of Le Loir. Its gardens have evolved throughout the centuries.