In 1267, Gilbert de Clare, who held the Lordship of Glamorgan, seized the lands around the town of Senghenydd in the north of Glamorgan from their native Welsh ruler. Caerphilly Castle was built to control the new territory and Castell Coch—strategically located between Cardiff and Caerphilly—was reoccupied. A new castle was built in stone around the motte, comprising a shell-wall, a projecting circular tower, a gatehouse and a square hall above an undercroft. The north-west section of the walls was protected by a talus and the sides of the motte were scarped to increase their angle, all producing a small but powerful fortification. Further work followed between 1268 and 1277, which added two large towers, a turning-bridge for the gatehouse and further protection to the north-west walls.