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.
Medici Fountain
The first difficulty of construction was the lack of water in the Left Bank of Paris. Unlike the Right Bank, where the water table was near the surface, and there were many wells and two aqueducts which served the city, the water table on the Left Bank was deep underground and all water had to be carried from the Seine. As a result, the city had expanded far from the Right Bank of the Seine, but had hardly grown at all on the Left Bank. This problem was finally solved by the construction of the aqueduct of Arcueil, between 1613-1623.