seats of the Dukes of Montrose include Buchanan Auld House near Drymen, Stirlingshire, which burned down in 1852. James Graham, 4th Duke of Montrose oversaw the construction of Buchanan Castle on this site of Buchanan Auld House from 1852 to 1858, which remained as the seats of the Dukes of Montrose until 1932, when James Graham, 6th Duke of Montrose