The Pont du Gard an ancient Roman aqueduct

The Pont du Gard is part of an ancient Roman aqueduct at three levels, converts road bridge in the middle ages. It was well maintained over the centuries, subject to a conservation since the sixteenth century. The construction allows to cross the Gardon River in the village of Vers-Pont-du-Gard.

This bridge is a section of an aqueduct 50 miles long that starts from Uzès (Languedoc-Roussillon) to go to Nimes. It passes through small mountains and valleys. It is estimated that the aqueduct was built in the 1st century, and the current bridge Gard in 40-60 years. It is considered a masterpiece of engineering, because the Romans were to retain a vertical drop all along the way, despite the importance of the relief of the region. 

It ceased to be used around the fifth century, after the invasion of the region by the Franks. Some stones of the aqueduct were then used as a building material for houses and other buildings. At the time of the Renaissance, when considered ancient books as models, restoration was begun.