Geograph - photograph every grid square

Barr Castle was constructed in the early 16th century. It passed into the hands of the Hamiltons of Ferguslie at the end of the 16th century. They retained the castle until the late 18th century, when they sold and abandoned it for a new mansion. The castle is protected as a category B listed building.

Various inscriptions are carved into the fabric of Barr Castle. These include IW and MH on the pediment above the main entrance, IH and IC 1680 above the lintel at the head of the stair, and WO 1699 on the battlements. The carvings are the initials of various Hamilton Lairds of Barr, John Wallace and his wife Margaret Hamilton, John Hamilton and Jean Cochrane.