Saint Germain castle in Montjovet played an important part in the history of Val d’Aosta. Few traces remain of its original structure and its construction date is not known for certain. At the end of the 13th century, the Savoy became the owners, replacing the Montjovet family. As already happened in Bard, in this case too, the pretext was provided by the abuse of power that Feidino Montjovet acted on villagers and wayfarers. The castle was later sold to the Challant family but returned to the Savoy in 1438, when Amadeus VII installed a garrison there, which remained active until 1661, when it was transferred to the fortress in Bard, leaving Montjovet castle open to decay.
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.