Sonnenburg castle hill has almost 4000 years history. It has been an early historical settlement, Roman camp, early medieval castle complex, 750 years as a convent, stone quarry, ruins and poorhouse. In 1022 Count Volkhold gave the castle to Benedictines and it was converted as an abbey. The ruins of the apses, which grow out of the rock, archaic and replete with strength, tell of power and wealth, faith and devotion, but likewise of deterioration and decline.
Today’s Sonnenburg is a hotel with a reservoir of historical detail. Wandering through the house we come across impressive relicts from bygone times: Gothic frescos in the former chancel, coffered ceiling in the Residenzstube (“Residence Parlour”), Stone age spearhead and the “in-house Saint Clement” who rests in the crypt.
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.