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Aqua Traiana
1st-century Roman aqueduct from Lake Bracciano to Rome / From Wikipedia, the free encyclopedia
The Aqua Traiana (later rebuilt and named the Acqua Paola) was a 1st-century Roman aqueduct built by Emperor Trajan and inaugurated in 109 AD.[1] It channelled water from sources around Lake Bracciano, 40 km (25 mi) north-west of Rome, to ancient Rome. It joined the earlier Aqua Alsietina to share a common lower route into Rome.
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It had only fallen into disuse in the 17th century.