Encinas Castle is dated back to the 14th century. The castle consists of a small and square enclosure, with two square towers in two of its corners. One of these served as the keep. In the other two corners the crenelated walls are raised to the same height as the two towers thus giving the false impression that the castle had four towers. There is a small stone ditch at the feet of the walls, which is provided with a low defensive wall.
In the 1950's the ruined castle was acquired by the Ministry of Agriculture. They restored it and turned it into a cereal silo. During these restorations however they blinded original windows and totally destroyed its medieval interior.
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.