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
Celsa (Roman city) the "scaenae frons" (stage) walls and tiers of seats ("cavea") have been found. Many small objects as lamps, Pompeian red slip dishes, Iberian ceramics, etc., as well as small bronzes, sculptural remains, coins and small pieces of jewellery are also preserved. A nearby museum displays many of the finds. Celsa (Roman city) Celsa was an important pre-Roman and Roman city located near the modern town of Velilla de Ebro. Recent excavations have brought to light many rich private and public buildings which give a glimpse of its former grandeur. Celsa was originally an Iberian settlement, called "Kelse", of the Ilergetes