Swansea Castle is located in the city centre of Swansea. It was founded by Henry de Beaumont in 1107 as the caput of the lordship of Gower. A timber castle existed in Swansea in 1116, when it was recorded as being attacked by Welsh forces who destroyed the outer defences. The castle was besieged in 1192 by Rhys ap Gruffydd, Prince of Deheubarth. Despite 10 weeks of starvation the castle was saved.
After various other unsuccessful attacks the castle fell in 1217 but was restored to the English in 1220 as part of the settlement between Llywelyn ap Iorwerth and Henry III of England. The castle was rebuilt in stone, probably between 1221 and 1284, firstly the inner castle with at least one tower, finally the large outer bailey.
By the 14th century the castle was losing its military importance. The castle owners were subsequently absentee landlords. By the 1670s the square tower was being used as a bottle factory and, in 1700, a town hall was built in the castle courtyard. By the mid 1700s the Great Hall had become Swansea's workhouse. The town hall was replaced by a post office in the 1800s and, by 1850, a military Drill Room had replaced the workhouse.
Part of the interior of the castle, in particular the large motte, was demolished 1909–1913 for the construction of a newspaper office. In the very early 1930s, poet Dylan Thomas worked for the South Wales Daily Post at the castle site. The newspaper offices were removed in 1976 and the remains of the castle were later consolidated and opened up to view from the street.
The only visible remains today, two sides of the rectangular South East corner of the outer bailey, were built in the late 13th or early 14th century. The south face (which ends in a tall garderobe tower) is capped with an elegant series of arcades at the wall-head.
References:Sigmaringen Castle was first mentioned in the year 1077 in the chronicles of Petershausen monastery. The oldest parts of the castle are concealed beneath the alterations made during the 17th and the 19th centuries. The secret of the earliest settlement built on this defendable rock will never be fully revealed: large-scale excavation work would be necessary, which the extensive land development renders impossible. Judging from the many Roman remains unearthed in the area around Sigmaringen, the 12th century keep known as the 'Roman Tower' could be traced back to a Roman predecessor.
The castle remains that have been preserved (gate, great hall and keep) date back to the Staufer period around 1200. The castle remains were integrated into subsequent buildings. The foundations of the castle buildings are to a large extent identical to the surrounding castle wall.
These remains give us a good idea of how the castle might have looked during the 12th century.