The walled medieval town of Cabrejas del Pinar was the leader of its Community of Burgs and Land and there are some traces left of the walled enclosure and fortress that protected the locals. The castle was built in stone on top of a high rock possibly between the 13th and 14th century.
Some of the walls, doors and the keep are still visible which helps understand how the fortress’ layout once was. The quadrangular keep was built in stone masonry and reinforced with ashlar on the corners. On some of the higher floors, you can still see wood fixed in holes that supported the wooden floors on each of the four stories. The access door can still be seen and is located on the south-east wall defended by watchtowers and an opening.
On the eastern part of the walled enclosure, there is still a circular watchtower placed there possibly in the 10th century in order to have better visual control over the Caliphate’s territories.
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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.