Pre-Christian basilica with a regular layout, the central nave paved with a magnificent mosaic which can still be seen. It dates from the 6th century A.D., when the Byzantine army of Justinian (the Eastern Roman Emperor who aspired to rebuild the Western Roman Empire) had conquered the Balearic Islands.
It faces from east to west, and on the northern side retains a small hemispherical baptismal font built in stone and mortar, with a waterproof lining.
There are three separate sections: The rectangular apse with the base of an altar, surrounded by bunches of grapes, the central motif being a classical wine bowl and two peacocks. The grapes represent life, while the peacocks facing one another represent the resurrection. Between the nave and the head, two lions face a palm tree. They have been interpreted as a reference to Jewish tradition, which was particularly important at that time in Maó. The lions represent the power of death, while the palm is the tree of life. The nave for the congregation reveals geometric figures and depictions of birds, in a clearreference to Paradise.
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.