The Alte Nahebrücke (Old Nahe Bridge) is a medieval stone arch bridge in Bad Kreuznach. It originally spanned the Nahe river and a neighbouring canal. Only the section spanning the canal remains intact. With four houses on its piers, it is one of the few remaining bridges in the world that has buildings on it.
Alte Nahebrücke was built around 1300 by Simon II, Count of Sponheim-Kreuznach, who ruled the town, to replace a wooden bridge which connected settlements on either side of the Nahe river. It provided an important connection on the road from to Mainz to Trier, and it formed part of the town fortifications. Towers on the bridge, one of which was for a period used as a prison, were destroyed by French troops in the late 17th century.
The bridge has two arms; one spanning the Nahe river and another, which supports the old buildings, spanning the Mühlenteich (mill pond) canal, which is parallel to the river. On Friday, 16 March 1945 the arm of the bridge spanning the river was blown up by German troops to hinder the approach of American forces. This destroyed a Baroque style Christian stone cross (a 1934 reproduction of the original) which was on the sixth pier of the bridge, and a statue of Saint John of Nepomuk, the bridge's patron saint, which was on the seventh pier.
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.