Bath city walls the Romans, to surround their town (known then as "Aquae Sulis"), probably in the 3rd century. The Anglo-Saxons by the 10th century had established Bath as a fortified "burh" (borough), utilising the existing town walls, and maintaining Bath as a centre of regional power. Bath, located on the northern edge of the kingdom of Wessex, would have guarded against any attack from neighbouring Mercia, which was held by the Danes for a time. The height of the walls was increased on the orders of King Stephen during The Anarchy. Bath's medieval walls included four gates. The North and South Gates
Aquae Calidae, Algeria has shown the abundance of evidences about Aquae Calidae Christian past. Occupied by the Vandals in the fifth century and damaged, the city was recovered to "Romanitas" by the Byzantines and regained importance during the sixth century. Conquered by Arabs around 700 AD, Aquae Calidae nearly disappeared in the next two centuries. Aquae Calidae, Algeria Aquae Calidae was a Roman colony of the Roman province of Mauretania Caesariensis. The Roman city has been identified with ruins at Hammam Righa in the wilaya of Chlef, Algeria, North Africa. The ruins are located at latitude 36.379474N, longitude 2.395618E near the railway town