Roman aqueduct
Rome's first aqueduct was built in 312 BC, and supplied a water fountain at the city's cattle market. By the 3rd century AD, the city had eleven aqueducts, sustaining a population of over a million in a water-extravagant economy; most of the water supplied the city's many public baths. Cities and towns throughout the Roman Empire emulated this model, and funded aqueducts as objects of public interest and civic pride, "an expensive yet necessary luxury to which all could, and did, aspire".
Italica
The aqueduct of 37 km total length was first built in the 1st c. AD and extended under Hadrian to add a more distant source for supplying the expanded city. It fed a huge cistern at the edge of the city which remains intact. Some of the piers of the arches are still visible near the city.