Aqua Claudia (Classical Latin: [ˈakwa ˈklawdɪa]) was an aqueduct of ancient Rome that, like the Anio Novus, was begun by Emperor Caligula (12 AD – 41 AD) in 38 AD and finished by Emperor Claudius (10 BC – 54 AD) in 52 AD. The Aqua Claudia was built between the dates of 38 AD to 52 AD, which was approximately 14 years. Its main springs, the Caeruleus and Curtius, were situated 300 paces to the left of the thirty-eighth milestone of the Via Sublacensis. Subiaco which was 70 km (43 mi) away from Rome was also a water source.