Cairnbulg Castle is a z-plan castle situated in Cairnbulg, Aberdeenshire, Scotland. It was described by W. Douglas Simpson as one of the nine castles of the Knuckle, referring to the rocky headland of north-east Aberdeenshire.[1] It stands by the River Philorth and was originally known as Philorth Castle (or Philorth House).[2] The 17th-century Philorth Castle, an L-plan house consisting of a sizeable crow-stepped block, was demolished after a fire in 1915.[3]
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