Montgomery
Montgomery Castle stands on a rocky spur above a small town near the Welsh border. Henry III began the stone fortress in 1223 as a defence against the growing power of Llywelyn the Great. In 1267 the Treaty of Montgomery recognised Llywelyn ap Gruffudd as Prince of Wales, giving the place a role in negotiations as well as war. The castle was surrendered to Parliament in 1644 during the Civil War. A battle on the plain below followed as Royalist forces attempted to recover it. Parliament ordered the fortress demolished in 1649, leaving low walls and ruined towers above the town.