Technology
The ancient Romans also had a complex system of aqueducts, which were used to transport water across long distances. The first Roman aqueduct was built in 312 BCE. The eleventh and final ancient Roman aqueduct was built in 226 CE. Put together, the Roman aqueducts extended over 450 kilometers, but less than seventy kilometers of this was above ground and supported by arches.
Romanization of Hispania
An important town needed a constant water supply for the thousands of people gathered in one place which could be sometimes several miles away from natural water source. To achieve this continuous flow of water the Romans built aqueducts.
The Roman aqueducts, despite their appearances, were built mostly underground. However, they are now known as the monumental aqueducts built to bridge geographic barriers in order to give a continuous water channel. The slenderness of this type of construction, along with the tremendous height reached by some of them, makes them the most beautiful works of civil engineering of all time, especially taking into account the difficulties overcome to build them.