Akrai was a Greek colony founded in Sicily by the Syracusans in 663 BC. It was among the first colonies of Syracuse founded by Corinthian colonists arriving in Sicilian territory.
Constructed on the peak of a hill, Akrai was difficult to attack and at the time of its construction an ideal point for watching the surrounding territory. By the treaty concluded by the Romans with Hieron II, king of Syracuse (270 - 215 BC), Akrai was included in the dominions of that monarch, and this was probably the period of its greatest prosperity.
During the Second Punic War it followed the fortunes of Syracuse, and afforded a place of refuge to Hippocrates of Syracuse, after his defeat by Marcus Claudius Marcellus at Acrillae, 214 BC. In 211 BC, after the fall of Syracuse, it became part of the Roman province, being known in Latin as Acre. This is the last mention of it in Classical history, and its name is not once noticed by Cicero. The city continued to be under Roman rule into the Byzantine period.
Excavations of the archaic city have revealed a theatre which is relatively small but were very well reconstructed. There are two stone quarries known as Intagliata and Intagliatella that were used as catacombs and dwellings in the late Antiquity. On the flat area above Intagliata are the foundation stones of the Aphrodision, the temple of Aphrodite, erected in the mid-6th century BC. At the western end of the site is the Bouleuterion, where the city council met. East of the hill are the Feral Temples, dedicated to the cult of the dead.
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.