By this time it should be evident that THC enjoys Roman history (of the empire & republic eras) as well as Roman roads, and, for that matter, roads of any type (see The Lincoln Highway and Forgotten Americans: Edmund de Smedt).
The Roman bridge at Alcantara was built between 104 and 106 AD in the reign of the Emperor Trajan, whose family hailed from Spain. The arch in the middle of the bridge bears the inscription Pontem perpetui mansurum in saecula ("I have built a bridge which will last forever") as well as Trajan's multiple titles. Although some reconstruction has occurred over the centuries, including one of the arches destroyed in 1809 during the Peninsular War between France and Britain.
616 feet long and 26 feet wide the bridge is located on the border of Spain and Portugal. No mortar was used in its construction.