Alcántara Bridge
Alcántara Bridge History of Puente Trajan at Alcantara Alcántara Bridge (Puente Trajan at Alcantara) is a Roman stone arch bridge spanning the Tagus River at Alcántara, Spain. Its architect was Caius Julius Lacer and it was built between 104 and 106 CE on the order of Roman Emperor Trajan from 98 CE.