The Heraion was a sanctuary dedicated to the goddess Hera, situated 8 kilometers from Argos. Built on the southern foothills of the Euboian mountain range, it included ritual sites like the Eleutherian Water for purification and the river Glykeia. Excavations revealed its connection to Mycenaean times and its importance grew from the 8th century BC, becoming a key religious and political center for Argos.
The sanctuary featured a monumental stairway leading to terraces with structures like a Doric stoa and a new temple designed by architect Eupolemos in 420 BC, housing renowned sculptures. Additional structures included an altar and a hypostyle hall, reflecting its significance in Hellenistic and Roman eras. The site remained revered by the Argives until late antiquity, reflecting its enduring importance in Greek religious life.
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.