The Château de Dinan consists of a keep and gate, which are part of the 2,600 metres of medieval ramparts which still surround the old town. The keep is called Donjon de la duchesse Anne (Keep of the Duchess Anne), and stands 34m high near the Saint Louis gate. John V, Duke of Brittany built the keep in 1382-1383. The keep is formed by a union of two tall circular towers; a moat and drawbridge divides the keep from the outside of the ramparts as well as from the inside of the city, providing a stronghold both against outsiders and from the townspeople themselves. Extensive machicolations overhang the wall head providing defensive coverage of the base of the tower. Château de Dinan is owned by the commune and houses the local museum.References:
Ängsö Castle was first named as "Engsev" in a royal charter by king Canute I of Sweden (r. 1167-1196), in which he stated that he had inherited the property after his father Eric IX of Sweden. Until 1272, it was owned by the Riseberga Abbey, and then taken over by Gregers Birgersson.
From 1475 until 1710, it was owned by the Sparre family. The current castle was built as a fortress by riksråd Bengt Fadersson Sparre in the 1480s. In 1522, Ängsö Castle was taken after a siege by king Gustav Vasa, since its owner, Fadersson's son Knut Bengtsson, sided with Christian II of Denmark. However, in 1538 it was given by the king to Bengtsson's daughter Hillevi Knutsdotter, who was married to Arvid Trolle.
In 1710, the castle was taken over by Carl Piper and Christina Piper. Ängsö Castle was owned by the Piper family from 1710 until 1971, and is now owned by the Westmanna foundation. The castle building itself was made into a museum in 1959 and was made a listed building in 1965. It is currently opened to visitors during the summers.
The castle is a cubical building in four stores made by stone and bricks. The lower parts is preserved from the middle ages. It was redecorated and expanded in the 1630s. The 4th storey as well as the roof is from the expansion of Carl Hårleman from 1740-41. It gained its current appearance in the 1740s.