The bridge was built by the architect Caius Julius Lacer, whose tomb remains near the site.
An inscription on the central arch reads: 'I have built a bridge which will last forever'.
The central piers reach down to the solid rock of the riverbed, ensuring structural stability against high-pressure water flow.
The bridge has survived multiple intentional destructions, most notably during the Reconquista and the Napoleonic Wars.
It is constructed from local granite, dry-jointed with exceptional precision.
The triumphal arch at the center is dedicated to Emperor Trajan and the gods of Rome.
The bridge spans approximately 194 meters in total length.
The Alcántara Roman Bridge is a second-century stone arch bridge spanning the Tagus River in Cáceres, Spain. Commissioned by Emperor Trajan in 104 AD and completed in 106 AD, the structure stands as a masterwork of Roman civil engineering. It consists of six arches supported by five piers, with the central arch reaching a height of 71 meters above the riverbed. A triumphal arch, the Temple of Trajan, sits at the center of the span. The bridge was constructed using granite blocks without the use of mortar. It serves as a vital historical link on the Via de la Plata, a major ancient Roman route connecting Augusta Emerita to Caesaraugusta. Despite centuries of military conflict, the bridge remains structurally intact, retaining its original design despite various repairs to its upper sections throughout history.
The riverbank viewpoint located downstream offers a full perspective of the bridge's height and arch geometry.
Wear sturdy walking shoes to navigate the uneven stone surface of the bridge deck.
Bring sun protection, as the bridge deck is completely exposed with no natural shade.
Check the water levels in advance; the visual impact of the height varies significantly by season.
Do not attempt to climb or sit on the edge of the low stone barriers, as there are significant drops.
