The Alcántara Bridge is a Roman arch bridge built between 104 and 106, which crosses the Tagus river in the town of Alcantara Caceres. It consists of 6 arcs unequal height, which rest on five pillars turn at different heights in the field of slate rock raided. There is a memorial shrine with a bow of superior victory in the middle of the bridge with a height of 10 m, called Trajan. The bridge is made of rusticated blocks of granite between 45 and 55 cm. In addition to the foot of the bridge there is a Roman temple dedicated to the constructor of the same, called Lácer and Christianized in the Middle Ages under the name of San Julián. Then he added a steeple and a cross resting on four skulls granite. Is buried engineer this work on it: Gaius Julius Lacer