The Ponte Pietra (Italian for 'Stone Bridge'), is a Roman arch bridge crossing the Adige River in Verona. The bridge was completed in 100 BC, and the Via Postumia from Genoa to Aquileia passed over it. It is the oldest bridge in Verona.
It originally flanked another Roman bridge, the Pons Postumius; both structures provided the city (on the right bank) with access to the Roman theatre on the east bank. The arch nearest to the right bank of the Adige was rebuilt in 1298 by Alberto I della Scala. Four arches of the bridge were blown up by retreating German troops in World War II, but rebuilt in 1957 with original materials.
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.