Huxter Fort is an iron age fortification on the island of Whalsay. It is on an islet in the Loch of Huxter, connected to the shore by a causeway. The fort was probably built around 300 BC, the generally accepted date of most similar fortifications in the region. This ring fort and blockhouse existed before the other two forts in Whalsay, brochs that were built just before the Christian era started. Huxter was standing until the 19th century. When described in 1879, the fort was much less dilapidated than today.
Entry to the fort enclosure was across the causeway, then through a passageway with rooms on either side and with a doorway in the center. The entrance section is part of the main wall. This is similar to the blockhouse at Clickhimin. The passage is just 0.76 m wide at its opening, and 1.1 m at its inner end. It has been conjectured that there may have been a two-story timber building built against the inner face of the fort. There is little structural evidence for this today. However, early accounts of the fort indicate that this may have been the case, and other forts show traces of what may have been internal stairways.
A ring wall runs around the islet, with a two-room blockhouse forming the defense opposite the causeway. The ring wall seems to have been built separately from the main structure. The blockhouse forms part of the ringwork, but is not bonded into the ring wall. The weaknesses in the defense of this and related structures could be explained by additional defenses of wood and thorn branches that have disappeared without leaving any trace. Another possibility is that the defenses were mainly symbolic, and perhaps played a part in warfare that was conducted according to formal rituals.
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.