Castillo de Alcaudete was built by the Arabs over the remains of a previous Roman fortification and taken by the Christians in 1085 during the reign of Alfonso VI. For almost three hundred years thereafter, the castle kept changing hands until 1340 when the Christians took it over.
The design is polygon in shape, adjusted to the terrain escarpments. The structure is surmounted by six towers, including the Tower of Homage, which has a door on the north side, guarded by two additional towers.
Today it has become a tourism-cultural space which houses the Interpretation Centre on the life of the Military Order of Calatrava. Visitors will go back to the 13th century to discover the construction of a castle on the border with the Nasrid Kingdom, the lifestyle and internal structure of the Order, the military armament used for the assault and defence of a fortress.
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.