The Bridge of Mantible (Puente Romano de Mantible) is a ruined bridge located near Logroño. According to some historians, construction of the bridge began in the first half of the 2nd century, well into Rome's imperial period. Others suggest that the bridge was built in the 11th century, near the same time in which the Puente La Reina was constructed over the River Arga, and that both were made to join the two most important cities of the Kingdom of Navarre, Nájera and Pamplona.
Neither theory makes clear at what point the bridge became no longer passable, but there are documents that suggest that it had already fully deteriorated by halfway through the 16th century.
The bridge is 164 meters long, 5 meters wide and reaches a maximum height of 30 meters. It was built with seven semicircular arches, only two of which stand relatively intact today. There are only a few remains of the other five arches. The two standing arches serve as an example of the excellent quarry stone used in the bridge.
References:The Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.