The Château de Thillombois is a Renaissance château significantly remodeled in the 19th century. The original château dates from the 12th century. Its size at the time was much larger than the current one that stands today. It was one of the largest medieval domains of the area, owned by a French noble family who also possessed, among others, the Château de Jarny, located in what is now known as Jarny in the department of Meurthe-et-Moselle. Heavily damaged in the 17th century during the Thirty years War, the château managed to retain a tower and a wing, while the surrounding villages were pillaged by Croats. restored by successive generations, emptied of all of its goods during the Reign of Terror, the castle found a new life in the 19th century when the heiress of the estate, the Countess d'Oryot-Apremont, married the Count of Nettancourt-Vaubécourt which then allowed a sufficient capital contribution to add a new main building and to restore the existing rooms around 1873.
The château remained within the Nettancourt-Vaubécourt family until 1961, where it was then acquired by the commune of Mantes-la-Ville into a summer camp center. The center fell into disuse in the 1980s. It was left to fate, until it was rented in the early 1990s by the Connaissance de la Meuse cultural association, who continued to make renovations and improvements. In 2010 the association became the official owner so that the château could remain in the public domain.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.