The history of Trigueros Castle isn't very well known. It is not built on a strategic position because, although located on a small hill in the village, it is dominated by other higher hills. So, the castle was probably more a fortified residence than a military strength. Also the name of the village church, an older building on a higher hill; Santa Maria del Castillo, seems to indicate that the most suitable place of a preceding strength already had been taken.
By its groundplan and disposition it seems to have been build in the 14th century. And reformed and completed in the 1453 as indicated by the coat of arms of Gutierre de Robres (or Robles) and his wife Maria de Guevara, placed above the entrance gate.
Visitors can admire the stables, as well as several blocks that once formed part of the Keep and gateway walls. The main entrance to the castle boasts the coats of arms of Gutierre de Robles and his wife María de Guevara, the lord and lady of the castle who carried out a considerable amount of work on the castle, as well as an inscription featuring the year 1453.
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.