Château de Ferrette is a ruined castle on a rocky peak looking over the town of Ferrette. It was built by in the 12th century by Frederic of Montbeliard, son of Louis IV, count de Monbéliard. It is not known if Frederic completely built the castle or simply restored a fortress by building on the ruins of what was an observation tower built by the Romans.
Given as a bailiwick to the lords Reich von Reichenstein in 1504, then to the Fuggers of Augsburg from 1540 to 1567, the castle was transformed into a garrison.
In 1600, the castle had three buildings, the higher castle, bailiff's house and house of knights. A wall with towers and bastions designed to be held in a determined attack, surrounded the castle.
Set on fire by the French in 1635, the castle was destroyed after the Thirty Years' War and only the lower part was restored. In 1644, at the Treaty of Munster in Westphalia, the Emperor of Austria yielded the county of Ferrette to the King of France, Louis XIV, who gave it to his minister, Cardinal Mazarin, who offered it to his niece. Her husband took the titles of Duke de Mazarin and Count de Ferrette. These titles were passed on to his heirs and exist today in the person of the Prince of Monaco who still carries the title of Count de Ferrette.
Thereafter, the castle was sold to the Zuber family, rich textile manufacturers from the Mulhouse region. Its ruins are maintained with the financial aid of the town of Ferrette.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.