An arch is a vertical curved structure that spans an elevated space and may or may not support the weight above it, or in case of a horizontal arch like an arch dam, the hydrostatic pressure against it.
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.
A viaduct is a specific type of bridge that consists of a series of arches, piers or columns supporting a long elevated railway or road. Typically a viaduct connects two points of roughly equal elevation, allowing direct overpass across a wide valley, road, river, or other low-lying terrain features and obstacles. The term viaduct is derived from the Latin via meaning "road", and ducere meaning "to lead". It is a 19th-century derivation from an analogy with ancient Roman aqueducts. Like the Roman aqueducts, many early viaducts comprised a series of arches of roughly equal length.
The ancient Romans were the first civilization to build large, permanent bridges. Early Roman bridges used techniques introduced by Etruscan immigrants, but the Romans improved those skills, developing and enhancing methods such as arches and keystones. There were three major types of Roman bridge: wooden, pontoon, and stone. Early Roman bridges were wooden, but by the 2nd century stone was being used. Stone bridges used the arch as their basic structure, and most used concrete, the first use of this material in bridge-building.
The Pont Neuf is the oldest standing bridge across the river Seine in Paris, France. It stands by the western (downstream) point of the Île de la Cité, the island in the middle of the river that was, between 250 and 225 BC, the birthplace of Paris, then known as Lutetia and, during the medieval period, the heart of the city.
An arch bridge is a bridge with abutments at each end shaped as a curved arch. Arch bridges work by transferring the weight of the bridge and its loads partially into a horizontal thrust restrained by the abutments at either side. A viaduct may be made from a series of arches, although other more economical structures are typically used today.
The Pont Saint-Bénézet, also known as the Pont d'Avignon, was a medieval bridge across the Rhône in the town of Avignon, in southern France. Only four arches survive.
Apt is a commune in the Vaucluse department in the Provence-Alpes-Côte d'Azur region in southeastern France.
The Durance is a major river in Southeastern France. A left tributary of the Rhône, it is 323.2 km (200.8 mi) long. Its drainage basin is 14,472 km2 (5,588 sq mi).
Bonnieux is a commune in the Vaucluse department in the Provence-Alpes-Côte d'Azur region in Southeastern France. In 2019, it had a population of 1,206. In the plain below the village stands the notable Roman bridge the Pont Julien.
The Pont de Bir-Hakeim, formerly the Pont de Passy, is an arch bridge that crosses the Seine in Paris. It connects the 15th and 16th arrondissement, passing through the Île aux Cygnes. The bridge, made of steel, was constructed between 1903 and 1905, in replacement of a footbridge that had been erected in 1878. The bridge has two levels: one for motor vehicles and pedestrians, the other being a viaduct built above the first one, through which passes Line 6 of the Paris Métro. The bridge is 237 metres (777 ft) long and 24.7 metres (81 ft) wide. The part crossing the Grand Bras of the Seine is slightly longer than the one crossing the Petit Bras.
The Pont Neuf, French for "New Bridge", is a bridge from the 16th and 17th centuries in Toulouse, in the South of France.
The Pont Notre-Dame is a bridge that crosses the Seine in Paris, France linking the quai de Gesvres on the Rive Droite with the quai de la Corse on the Île de la Cité. The bridge is noted for being the "most ancient" in Paris, in the sense that, while the oldest bridge in Paris that is in its original state is undoubtedly the Pont Neuf, a bridge in some form has existed at the site of the Pont Notre-Dame since antiquity; nonetheless, it has been destroyed and reconstructed numerous times, a fact referred to in the Latin inscription on it to honor its Italian architect, Fra Giovanni Giocondo. The bridge once was lined with approximately sixty houses, the weight of which caused a collapse in 1499.
The Petit Pont is an arch bridge crossing the River Seine in Paris, built in 1853, although a structure has crossed the river at this point since antiquity. The present bridge is a single stone arch linking the 4th arrondissement and the Île de la Cité, with the 5th arrondissement, between quai de Montebello and quai Saint-Michel. The Petit Pont is notable for having been destroyed at least thirteen times since its original inception during Gallo-Roman times to the mid-19th century.
The Pont sur la Laye or Pont roman de Mane is an old stone arch bridge across the stream Laye in the French Provence close to the town Mane.
The Pont de Pierre, meaning "Stone Bridge", is a Roman bridge in the Italian city of Aosta in the Aosta Valley. The bridge crossed the Buthier about 600 m (2,000 ft) from the eastern exit of the Roman colony Augusta Praetoria; in later times the torrente changed its course, leaving the ancient bridge today without water.
The Pont Flavien is a Roman bridge across the River Touloubre in Saint-Chamas, Bouches-du-Rhône department, southern France. The single-arch crossing, which was built from limestone, was on a Roman road - the Via Julia Augusta - between Placentia, Italy and Arles. It is the only surviving example of a Roman bridge bounded by triumphal arches from the Augustan period, although similar bridges probably existed elsewhere, as indicated by portrayals on coins of the late 1st century BC.
Aqueducts are bridges constructed to convey watercourses across gaps such as valleys or ravines. The term aqueduct may also be used to refer to the entire watercourse, as well as the bridge. Large navigable aqueducts are used as transport links for boats or ships. Aqueducts must span a crossing at the same level as the watercourses on each end. The word is derived from the Latin aqua ("water") and ducere, therefore meaning "to lead water". A modern version of an aqueduct is a pipeline bridge. They may take the form of tunnels, networks of surface channels and canals, covered clay pipes or monumental bridges.
