At Knap of Howar on the island of Papa Westray, a Neolithic farmstead may be the oldest preserved stone house in northern Europe. Radiocarbon dating shows that it was occupied from 3700 BC to 2800 BC, earlier than the similar houses in the settlement at Skara Brae on the Orkney Mainland.
The farmstead consists of two adjacent rounded rectangular thick-walled buildings with very low doorways facing the sea. The larger and older structure is linked by a low passageway to the other building, which has been interpreted as a workshop or a second house. They were constructed on an earlier midden, and were surrounded by midden material which has protected them. There are no windows; the structures were presumably lit by fire, with a hole in the roof to let out smoke. Though they now stand close to the shore, they would have originally lain inland. The shore shows how the local stone splits into thin slabs, giving a ready source of construction material.
Looking back through the low entrance doorway into the main house, a visitor's backpack gives an idea of scale.
The walls still stand to an eaves height of 1.6 metres, and the stone furniture is intact giving a vivid impression of life in the house. Fireplaces, partition screens, beds and storage shelves are almost intact, and post holes were found indicating the roof structure.
Evidence from the middens shows that the inhabitants were keeping cattle, sheep and pigs, cultivating barley and wheat and gathering shellfish as well as fishing for species which have to be line caught using boats.
Finds of finely-made and decorated Unstan ware pottery link the inhabitants to chambered cairn tombs nearby and to sites far afield including Balbridie and Eilean Domhnuill. The name Howar is believed to be derived from Old Norse word haugr meaning mounds or barrows.
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.