Aqua Claudia

"The Aqua Claudia, also known as the Claudian Aqueduct, was an ancient Roman aqueduct that supplied water to the city of Rome. It was begun by Emperor Caligula in 38 AD and finished by Emperor Claudius in 52 AD. The aqueduct was 69 kilometers (43 miles) long and delivered 184,000 cubic meters (6.5 million cubic feet) of water per day. The Aqua Claudia was one of the most impressive aqueducts ever built. It was constructed from concrete and travertine marble, and it was supported by a series of arches that reached heights of up to 30 meters (100 feet). The aqueduct was also notable for its use of siphons, which allowed it to cross valleys and other obstacles. The Aqua Claudia supplied water to the Caelian and Esquiline Hills in Rome. It was used to feed public baths, fountains, and private homes. The aqueduct remained in use until the 6th century AD, when it was damaged by the Ostrogoths. "