Roman Bridge, Trier

The Roman Bridge (Römerbrücke) spans the Moselle in Trier, Germany. Its nine stone pillars date to the 2nd century AD, replacing wooden predecessors from at least 17 BC[1]. It is Germany's oldest standing bridge and the oldest Roman bridge north of the Alps[1]. Roman visitors tossed coins into the river for good luck; experts estimate around one million coins may lie in the riverbed[1]. The superstructure was rebuilt in the early 12th and early 18th centuries[1]. Since 1986, the bridge has been a UNESCO World Heritage Site as part of Trier's Roman monuments[1].