A former stronghold of the Stewarts in Dumfries and Galloway, Castle Stewart lies just west of the River Cree, 3 miles (5 km) northwest of Newton Stewart. Built in the early 16th C., this towerhouse is partially ruined but still stands to four storeys. It was surrounded by a courtyard containing ancillary buildings, but these are not fragmentary. B-listed in 1979, the castle was named after Colonel William Stewart, a son of Lord Ochiltree, who made a fortune as a mercenary soldier fighting under Gustavus Adolphus of Sweden in the 1630s. On his return to Scotland he bought the estate which was then called Calcruchie.