Alcántara Bridge

The Alcantara Bridge is a Roman stone arch bridge spanning the Tagus River in Extremadura, Spain, built between AD 104 and 106 on the orders of Emperor Trajan. Designed by architect Gaius Julius Lacer, it measures 194 m long, 8 m wide, and 71 m high, with six arches reaching spans of up to 30 m. A triumphal arch stands at the bridge's centre, and a small temple at one end bears a dedication to Trajan. Despite war damage over the centuries, including Moorish destruction of an arch in 1214, it remains standing today.