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| width = | height = | mainspan = | spans = | pierswater = 5 | complete = 40-60 AD? | cost = 30 million sesterces (est.) | toll = | traffic = | preceded = | followed = | collapsed = | closed = 6th century? | replaces = | latd = 43 | latm = 56 | lats = 50 | latNS = N | longd = 04 | longm = 32 | longs = 08 | longEW = E | coordinates_display = inline,title | coordinates_region = FR | map_type = France | references = | extra = }} The Pont du Gard is an ancient Roman aqueduct that crosses the Gardon River in the south of France. Located near the town of Vers-Pont-du-Gard, the bridge is part of the Nîmes aqueduct, a 50-kilometer system built in the first century AD to carry water from a spring at Uzès to the Roman colony of ''Nemausus'' (Nîmes) Because of the uneven terrain between the two points, the mostly underground aqueduct followed a long, winding route that called for a bridge across the gorge of the Gardon River. The Pont du Gard is the highest of all elevated Roman aqueducts, and, along with the Aqueduct of Segovia, one of the best preserved. It was added to UNESCO's list of World Heritage Sites in 1985 because of its historical importance. The bridge has three tiers of arches, standing high. The whole aqueduct descends in height by only over its entire length, while the bridge descends by a mere – a gradient of only 1 in 3,000 – which is indicative of the great precision that Roman engineers were able to achieve, using only simple technology. The aqueduct formerly carried an estimated of water a day to the fountains, baths and homes of the citizens of Nîmes. It continued to be used possibly until the 6th century, with some parts used for significantly longer, but lack of maintenance after the 4th century meant that it became increasingly clogged by mineral deposits and debris that eventually choked off the flow of water. After the collapse of the Roman Empire and the aqueduct's fall into disuse, the Pont du Gard remained largely intact, due to the importance of its secondary function, as a toll bridge. For centuries the local lords and bishops were responsible for its upkeep, in exchange for the right to levy tolls on travellers using it to cross the river, although some of its stones were looted and serious damage was inflicted on it in the 17th century. It attracted increasing attention starting in the 18th century and became an important tourist destination. It underwent a series of renovations between the 18th and 21st centuries, commissioned by the local authorities and the French state, that culminated in 2000 with the opening of a new visitor centre and the removal of traffic and buildings from the bridge and the area immediately around it. Today it is one of France's most popular tourist attractions and has attracted the attention of a succession of literary and artistic visitors. ==Description== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Pont du Gard」の詳細全文を読む スポンサード リンク
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