Pont Cysyllte is a 17th-century road bridge crossing the River Dee near the village of Trevor, Wrexham County Borough, Wales. It lies 200 m west of Thomas Telford's Pontcysyllte Aqueduct.
The sandstone bridge is dated '1697', though it was substantially rebuilt during the 18th century, and only the south arch and part of the south pier are original. The bridge comprises three arches, with full-height triangular cutwaters between each arch, each topped by a pedestrian refuge. The older south arch has a span of 10.7 m and the north arches have spans of 14 metres and 14.2 metres.
The bridge has been regularly damaged by motor vehicles being, at its narrowest, only 1.83 metres feet wide. Vehicles are supposed to stop before crossing and give priority to any oncoming vehicle already on the bridge.
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.