Heraclea was an ancient city of Magna Graecia. The ruins of the city are located in the modern comune of Policoro in Basilicata. It was a Greek colony, but founded at a period considerably later than most of the other Greek cities in this part of Italy. The foundation of the city is placed by Diodorus in 432 BCE. It became famous as the site of the first major battle of the Pyrrhic War in 280 BCE in which king Pyrrhus of Epirus defeated a Roman army on the head of a coalition of Southern Italian Greek city states.
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.