Cairnbulg Castle is a z-plan castle situated in Cairnbulg, Aberdeenshire. Originally known as Philorth Castle, it was built in the early 14th century, destroyed in the winter of 1308–1309 in the Wars of Independence, and re-built by the Fraser family in 1380. Subsequently, a courtyard and outbuildings were added to the main tower. It is now open to the public by appointment only. Flora Fraser, 21st Lady Saltoun and her husband Captain Alexander Ramsay of Mar, who was one of Queen Victoria's great grandchildren, lived there for a while but nowadays their daughter Katharine Fraser, Mistress of Saltoun, lives there with her family.
During the Second World War the castle was used as the Officers' Mess for nearby RAF Fraserburgh.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.