Trajan's Bridge or Bridge of Apollodorus over the Danube was a Roman segmental arch bridge, the first to be built over the lower Danube. Though it was only functional for a few decades, for more than 1,000 years it was the longest arch bridge in both total and span length. The bridge was constructed in 105 AD by instruction of Emperor Trajan by Greek architect Apollodorus of Damascus for the deployment of Roman troops during the conquest of Dacia. The wooden superstructure of the bridge was dismantled by Trajan's successor, Hadrian, in order to protect the empire from barbarian invasions from the North. In 1932, there were 16 pillars remaining underwater, but in 1982 only 12 were mapped by archaeologists; the other four had probably been swept away by water. Only the entrance pillars are now visible on either bank of the Danube. In 1979, Trajan's Bridge was added to the Monument of Culture of Exceptional Importance.
The Broel Towers (in Dutch: Broeltorens) are a classified monument and a landmark in the Belgian city of Kortrijk. The towers are known as one of the most important symbols of the city. Although they look identical, the towers were not built at the same time. The Southern tower was built in 1385 to control the traffic on the river Lys. The Northern tower, known as the Ingelborchtoren was built in 1415 and was used as an armory. Nowadays, the towers are, together with the Artillerytower (in Dutch: Artillerietoren), the last remaining parts of the medieval city wall around the city. A statue of John of Nepomuk can be found in the middle of the bridge spanning between the two towers. The bridge between the two towers was destroyed in both world wars.
Besalú is a town in Girona, Catalonia. The town's importance was greater in the early Middle Ages, as capital of the county of Besalú, whose territory was roughly the same size as the current comarca of Garrotxa but sometime extended as far as Corbières, Aude, in France. Wilfred the Hairy, credited with the unification of Catalonia, was