The 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.
- "Kantonsliste A-Objekte". KGS Inventar (in German). Federal Office of Civil Protection. 2009. Retrieved 25 April 2011.
- Medieval Nyon in German, French and Italian in the online Historical Dictionary of Switzerland.
- Ancien Régime Nyon in German, French and Italian in the online Historical Dictionary of Switzerland.
- Château de Nyon - official site (French)
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