
Barnes Castle in East Lothian is an unfinished late-16th-century fortress on the slope of the Garleton Hills near Haddington, designed on an unusual axial plan. Built by Sir John Seton of Barnes, diplomat and court treasurer under James VI, the quadrangular castle features corner towers and intermediate defensive towers equipped with gun loops. An earlier castle occupied the site, destroyed in 1544 by English forces during the Wars of Scottish Independence. The remains, also known as Barney Vaults or The Vaults, are protected as a scheduled monument and reflect ambitious Renaissance military architecture interrupted by historical turbulence.