Source: http://en.wikipedia.org/wiki/Balhousie_Castle
Balhousie Castle dates to 1631, though its origins are believed to go back a further three hundred years. It originally served as the seat of the Earls of Kinnoull, and stood within a walled enclosure containing subsidiary buildings, orchards etc., on a terrace overlooking the North Inch.
After falling into neglect in the early 19th century, the Castle was 'restored' and extensively remodelled on a larger scale in 1862-63 in the Baronial style by the architect David Smart. No original features survive except for parts of the original rubble walls on the east side.
In 1962, the Castle became the Regimental Headquarters and Museum of The Black Watch. The Regimental Trustees bought Balhousie Castle in January 2009