The Vieux-château de l'île d'Yeu ("Old castle of the Isle of Yeu") is a fortification on the island of île d'Yeu. Olivier IV de Clisson, a great builder of castles, undertook the work with the aim of protecting the islanders in the event of foreign invasion. The longest of these had been led by the famous English pirate, Robert Knolles, who managed to seize the castle in 1355 and occupied the island for 37 years. In 1381, the île d'Yeu was retaken during the reconquest of Poitou by Olivier V de Clisson.
During the Renaissance, Jean V de Rieux, master of the isle, erected towered walls around the castle. This type of construction was carried out by Italian engineers brought back from the Italian Wars by King Francis I. Later, Vauban perfected this style of military architecture for his famous forts. This protection proved effective in 1550 when several thousand Spanish soldiers attacked from the north. Held in check under the walls by the local garrison, they were forced to retreat by sea to the Iberian peninsula.
The Vieux-château, made obsolete by the construction between (1654 and 1660) of small coastal forts following Vauban's technique, was demolished at the end of the 17th century, along with several other ancient castles on the French coast, by order of Louis XIV, worried that they could be taken by an enemy and used as strong points.
Hergé was inspired by the Vieux-château in the design of the Adventures of Tintin comic book The Black Island.
References:The Château de Chantilly comprises two attached buildings: the Petit Château built around 1560 for Anne de Montmorency, and the Grand Château, which was destroyed during the French Revolution and rebuilt in the 1870s. Owned by the Institut de France, the château houses the Musée Condé. It is one of the finest art galleries in France and is open to the public.
The estate"s connection with the Montmorency family began in 1484. The first mansion (now replaced by the Grand Château) was built in 1528–1531 for the Constable Anne de Montmorency by Pierre Chambiges. The Petit Château was also built for him, around 1560, probably by Jean Bullant. In 1632, after the death of Henri II, it passed to the Grand Condé who inherited it through his mother, Charlotte Marguerite de Montmorency.
Several interesting pieces of history are associated with the château during the 17th century.