Midhowe Broch is an iron-age structure situated on a narrow promontory between two steep-sided creeks, on the north side of Eynhallow Sound. The broch is part of an ancient settlement, part of which has been lost to coastal erosion. The broch got its name from the fact that it's the middle of three similar structures that lie grouped within 500 metres of each other and Howe from the Old Norse word haugr meaning mound or barrow.
The broch tower has an internal diameter of 9 metres within a wall 4.5 metres thick, which still stands to a height of over 4 metres. The broch interior is crowded with stone partitions, and there is a spring-fed water tank in the floor and a hearth with sockets which may have held a roasting spit.
The broch is surrounded by the remains of other lesser buildings, and a narrow entrance provides access into the defended settlement. The other buildings seem to have been built as adjacent houses, but later in the site’s history they were used as workshops, and one of these buildings still retains its iron-smelting hearth.
A short distance to the southeast is a large Neolithic chambered cairn known as Midhowe Chambered Cairn.
The broch and attendant buildings were excavated between 1930 and 1933 and then taken under guardianship. The excavations recovered stone and bone tools associated with grain-processing, spinning and weaving. Also found were pieces from crucibles and moulds associated with bronze-working. Also discovered was a fragment from a Roman bronze vessel.
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.