Barnard's Tower is a 13th century three storey spur-tower, founded by William de Valence. Flanking the north-east angle of medieval town wall of Pembroke, it was built for independent defence. The entrance to the forebuilding was once defended by a bridge-pit and its vaulted passage was guarded by a gate and a portcullis. A spiral stair, gives access to all the floors and the dome-vault roof supports the remains of a parapet. Nearby is Pembroke Castle and 12 miles north is Haverfordwest Castle.