What Roman aqueduct still supplies water to the Trevi Fountain in Rome?

The Aqua Virgo is the ancient Roman aqueduct whose restored channel supplies the Trevi Fountain.

Marcus Vipsanius Agrippa completed the aqueduct in 19 BC, during the reign of Augustus. Its water came from springs outside Rome and was carried along a route of roughly 22 kilometres, ultimately serving the Baths of Agrippa and several city districts. According to the traditional story, a young girl—or “virgo”—helped Roman soldiers locate the spring, giving the aqueduct its name.

After the western Roman Empire declined, the system suffered damage but was repeatedly repaired. Renaissance restorations created the Acqua Vergine, the modern continuation of the ancient Aqua Virgo. The Trevi Fountain became its grand Baroque terminal display, rather than a separate water source.

A common misconception is that the fountain is fed by Aqua Claudia or Aqua Marcia. Those were different Roman aqueducts; the Trevi’s historic supply is the Aqua Virgo lineage.