Binderveld Castle was first time mentioned in 1135 when it was owned by Olderic van Bilrevelt , who received the loan in 1135. The castle was rebuilt in 1635-1653 by Hieronymus Van Copis. The castle was again destroyed in 1637, now by State troops. Moreover, in 1728 the castle burned out completely due to an accident. It was rebuilt again in 1729. Only the gate tower and the residence have been preserved. In 1865 the drawbridge was replaced with a fixed stone bridge. The chapel, which belonged to the castle, was replaced in 1842 by the current church.
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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.