The Château de Tonquédec is one of the most visited monuments in the département of the Côtes d'Armor. The castle ruins with its several towers and a closed curtain wall is one of the most impressive French medieval sites. From the height of a rocky cliff it dominates the valley of the Léguer. It is a genuine vestige of feudal Brittany. The present castle was built in the 15th century, on the site of an earlier 12th-century castle (built by the Coëtmen-Penthièvre family). It was partially dismantled by order of Jean IV, Duke of Brittany, in 1395 because of a conflict between him and the Penthièvres. Indeed, Rolland II and Rolland III of Coëtmen, Viscounts of Tonquédec, had allied themselves to the rebellion of Olivier de Clisson.
Reconstruction began in 1406 by Rolland IV of Coëtmen. The castle subsequently changed owners several times, before becoming an artillery base in 1577. At this time, the owning family (Goyon de La Moussaye), being Protestant, was therefore in disagreement with the king, Henri IV. During the War of the League, the castle was a hiding place for Huguenots. It was finally dismantled around 1622 on the orders of the powerful Cardinal Richelieu.
The castle currently belongs to descendants of the original builders, House of Coëtmen-Penthièvre. The entrance gate leads to an outer fortified courtyard or basse-cour. Two towers, joined by a curtain wall, frame the entrance to the inner courtyard which is reached by a postern, once protected by a moat and drawbridge. The keep with walls 4m thick, stands detached from the curtain walls, at the rear of the ensemble. The ruins may be visited from April to October.References:
First record of Kastelholma (or Kastelholm) castle is from the year 1388 in the contract of Queen Margaret I of Denmark, where a large portion of the inheritance of Bo Jonsson Grip was given to the queen. The heyday of the castle was in the 15th and 16th centuries when it was administrated by Danish and Swedish kings and stewards of the realms. Kastelhoma was expanded and enhanced several times.
In the end of 16th century castle was owned by the previous queen Catherine Jagellon (Stenbock), an enemy of the King of Sweden Eric XIV. King Eric conquered Kastelholma in 1599 and all defending officers were taken to Turku and executed. The castle was damaged under the siege and it took 30 years to renovate it.
In 1634 Åland was joined with the County of Åbo and Björneborg and Kastelholma lost its administrative status.