The Callanish III stone circle is one of many megalithic structures around the better-known (and larger) Callanis Stones (I) on the west coast of the isle of Lewis. The stone circle consists of two concentric ellipses. The outer ring measures about 13.7 by 13.1 metres. It contains 13 stones, of which eight are still standing and five have fallen. The inner ring is a pronounced oval measuring 10.5 by 6.6 metres. Only four stones remain in the inner circle, the tallest of which measures 2.1 metres. There is no sign of a central mound or cairn.
It is just a few hundred metres from the Callanish II stone circle.
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.