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.
Odivelas
In the early 18th century, King John V, ordered the construction of an aqueduct to transport water from the parish of Caneças to the city of Lisbon, which suffered from chronic lack of water. The Águas Livres Aqueduct, which began to operate in 1748, is one of the masterpieces of ancient Portuguese engineering.