The Pont du Gard is an ancient Roman aqueduct bridge built in the first century AD to carry water over 50 km (31 mi) to the Roman colony of Nemausus (Nîmes). It crosses the river Gardon near the town of Vers-Pont-du-Gard in southern France. The Pont du Gard is the tallest of all Roman aqueduct bridges, as well as one of the best preserved. It was added to UNESCO's list of World Heritage sites in 1985 because of its exceptional preservation, historical importance, and architectural ingenuity. The bridge has three tiers of arches made from Shelly limestone and stands 48.8 m (160 ft) high. The aqueduct formerly carried an estimated 40,000 m3 (8,800,000 imp gal) of water a day over 50 km (31 mi) to the fountains, baths and homes of the citizens of Nîmes. The structure's precise construction allowed an average gradient of 1 cm (0.39 in) in 182.4 m (598 ft). It may have been in use as late as the 6th century, with some parts used for significantly longer, but lack of maintenance after the 4th century led to clogging by mineral deposits and debris that eventually stopped the flow of water. More information...
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