The Pont du Gard is the Roman aqueduct bridge near Nîmes, France, known for its three tiers of arches and UNESCO World Heritage status.
Built in the first century AD, it carried water across the Gardon River as part of an approximately 50-kilometre aqueduct supplying the Roman colony of Nemausus, modern Nîmes. The bridge was constructed from locally quarried limestone, largely without mortar, and its precise stonework helped it survive for nearly two millennia.
The three levels served different structural purposes. The lowest tier has large arches, the middle tier has smaller arches, and the upper tier supported the water channel. The aqueduct maintained a gentle gradient so water could flow by gravity toward Nîmes.
Although visitors often call it simply a Roman bridge, the Pont du Gard was primarily an aqueduct crossing. Its upper water channel is much narrower than the lower arches suggest. UNESCO added the monument to its World Heritage List in 1985.