St. Servatius Bridge (Sint Servaasbrug) connects pedestrian traffic from the Binnenstad district of Maastricht on the west bank of the Meuse to the Wyck district on the east bank. It is named after Saint Servatius, the first bishop of Maastricht, and (despite being largely rebuilt after World War II) it has been called the oldest bridge in the Netherlands. The bridge is made of limestone, and in its current configuration it is 160 metres long and 9 metres wide.
The Romans built a wooden bridge across the Meuse in what is now Maastricht, in approximately AD 50, and the Latin phrase for 'crossing of the Meuse', 'mosae trajectum', became the name of the city. For many years this remained the only crossing of the lower Meuse. However, the Roman bridge collapsed in the year 1275 from the weight of a large procession, killing 400 people. Its replacement, the present bridge, was built somewhat to the north of the older crossing between 1280 and 1298; the Catholic church encouraged its construction by providing indulgences to people who helped build it.
The bridge was renovated in 1680, and in 1825 a wooden strutwork section on the east side of the bridge was replaced by a stone arch. In 1850, as part of the construction of the Maastricht-Liège Canal, a channel was cut on the west side of the bridge.
When in the early 1930s the bridge had been relieved of its function as the city's only river crossing by the construction of the Wilhelmina bridge, 300 metres downstream, a major renovation was performed. The arches were reconstructed in concrete, covered with the original stones. Underwater, counter-arches were constructed to prevent erosion of the river bed on which the bridge was built. Two arches on the eastern end of the bridge were removed and replaced by a vertical-lift bridge.
During World War II the bridge was severely damaged by the German army as they retreated from the Netherlands in 1944, but it was rebuilt in 1948. In 1962, the shipping channel to the east of the bridge was spanned by a steel drawbridge attached to the main bridge.
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.