The Romans managed to transport water over hundreds of kilometres using only gravity and an almost imperceptible slope, without pumps or motors. Building the aqueduct was only half the work, but these works represent one of the greatest feats of Roman engineering.
The aqueducts brought water to cities over dozens, sometimes hundreds, of kilometres. Some lasted so long that they still work today, demonstrating the durability and efficiency of Roman construction.
The largest of all Roman aqueducts was the one that supplied Constantinople, modern-day Istanbul, which stretched about 426 kilometres, being the longest in the ancient world.
In Portugal there are some examples of Roman aqueducts, such as the one at Conímbriga, which was about 3.5 kilometres long.
