Aqua Claudia

The Aqua Claudia is an ancient Roman aqueduct built in the 1st century AD and completed under Emperor Claudius, with an official inauguration in 52 AD. It was one of Rome’s principal imperial aqueducts, carrying water from distant sources into the city.

Significant sections of its elevated masonry arches survive and are visible outside the city, notably in the Parco degli Acquedotti and near the Porta Maggiore junction where several aqueducts entered Rome. Those surviving arches are characteristic examples of Roman engineering and remain a focal point for visitors studying Rome’s infrastructure.

The aqueduct was constructed in stages that began under Caligula’s reign and were finished under Claudius; it supplied baths, fountains and public works in imperial Rome and remained part of the urban water system for centuries thereafter.

Its remains lie on the outskirts of ancient Rome and are accessible from the Appian Way and adjacent historical parks.

• Construction and inauguration: Construction began under Caligula and the aqueduct was completed and inaugurated under Emperor Claudius in 52 AD as a major supply line into Rome.
• What to see: Large elevated masonry arches are among the best-preserved visible remains of Rome's aqueduct system and are accessible from the Appian Way and Parco degli Acquedotti.

What to See #

• Surviving arched sections: Visible arched sections that survive outside Rome, notably along the Appian and eastern corridors where the aqueduct's masonry forms part of the Parco degli Acquedotti landscape.
• Porta Maggiore junction: Porta Maggiore area - where multiple ancient aqueduct channels converge and where the Aqua Claudia entered the city circuit in antiquity.