The Former Cathedral of Baeza was the cathedral episcopal see of the Roman Catholic Diocese of Baeza, which has a Visigothic period, was suppressed after some time under Moorish rule and was shortly restored after the Reconquista under the Kingdom of Castile in the thirteenth century, but suppressed for good, never again to regain (co-)cathedral status.
The site, like the land, alternated between mosque and church during 12th and 13th centuries. The apse still maintains Gothic tracery, but in the 16th-century a major reconstruction by Andrés de Vandelvira in Renaissance-style created the present church. The construction of the cathedral finally ended in 1593, shortly after the death of Andrés de Vandelvira.
The church forms part of a UNESCO World Heritage Site with other monuments in Baeza and in the nearby city of Úbeda.
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.