The Penrhos Feilw Standing Stones are a pair of standing stones on Holy Island west of Anglesey in north-west Wales. They are thought to date from the Bronze Age but their origins and purpose are unclear. They are about 3 m high and are a similar distance apart.
The stones are located behind the farmhouse of Plas Meilw. Little is known about the history of the stones. They are believed to be between 3,500 and 4,000 years old and are a Scheduled ancient monument.
The stones are in the care of Cadw; the site is open to the public throughout the year, except around Christmas and the New Year, free of charge. Access is through a kissing gate and across a grassy field, and there is a pull-in by the roadside, large enough for a single car.
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.