Cairnie was a property of the Lindsay family, later Earls of Crawford, from 1355. The tower was constructed around 1500 by Alexander Lindsay of Auchtermoonzie (d.1517). The second son of the 4th earl of Crawford, Alexander subsequently became 7th earl, inheriting the earldom from his nephew who was killed at the Battle of Flodden in 1513. According to John Knox, James V of Scotland visited the castle just before his death in 1542. It was unoccupied in the 17th century, and was used for religious meetings by an outlawed Episcopal congregation. It was later used for agricultural purposes.
It was originally an L-plan tower house with five storeys, including a barrel-vaulted basement and a garret. The stair tower is located on the north-west side, linking all floors from a ground floor entrance. The parapet and many of the dressed stones forming the window surrounds have been lost. To the north-east is a single round tower, once flanking a gate within an outer enclosure wall.
References:Château de Niort is a medieval castle in the French town of Niort. It consists of two square towers, linked by a 15th-century building and dominates the Sèvre Niortaise valley.
The two donjons are the only remaining part of the castle. The castle was started by Henry II Plantagenet in the 12th century and completed by Richard the Lionheart. It was defended by a rectangular curtain wall and was damaged during the Wars of Religion. In the 18th century, the castle served as a prison.
The present keeps were the central point of a massive fortress. The southern keep is 28m tall, reinforced with turrets. The northern tower is slightly shorter at 23m. Both are flanked with circular turrets at the corners as well as semicircular buttresses. Each of the towers has a spiral staircase serving the upper floors. The Romanesque architecture is of a high quality with the dressed stones closely jointed.