Glanum was an oppidum, or fortified town in present day Provence, founded by a Celto-Ligurian people called the Salyes in the 6th century BCE. It became officially a Roman city in 27 BCE and was abandoned in 260 AD. It is particularly known for two well-preserved Roman monuments of the 1st century BC, known as les Antiques, a mausoleum and a triumphal arch (the oldest in France).
Between the 4th and 2nd centuries BC, the Salyens, the largest of the Celto-Ligurian tribes in Provence, built a rampart of stones on the peaks that surrounded the valley of Notre Dame-de-Laval, and constructed an oppidum around the spring in the valley, which was known for its healing powers. A shrine was built at the spring to Glanis, a Celtic god. The town grew, and a second wall was built in the 2nd century BC. In 125 BC the Salyens were defeated by the army of the Roman consul Marcus Fulvius Flaccus, and the following year decisively defeated by C. Sextus Calvinus. Many of the old monuments of Glanum were destroyed.
Due to its commercially useful location on the Via Domitia, and the attraction of its healing spring, the town prospered again. The city produced its own silver coins and built new monuments. The prosperity lasted until 90 BC when the Salyens again rebelled against Rome. The public buildings of Glanum were again destroyed. The rebellion was crushed this time by the Consul Caecilius, and the remains of the main buildings demolished and replaced by more modest structures.
In 49 BC Julius Caesar captured Marseille, and after a period of destructive civil wars, the Romanization of Provence and Glanum began.
In 27 BC the Emperor Augustus created the Roman province of Gallia Narbonensis, and in this province Glanum was given the title of Oppidum Latinum, which gave residents the civil and political status of citizens of Rome. A triumphal arch was built outside the town between 10 and 25 BC, near the end of the reign of Augustus, (the first such arch to be built in Gaul), as well as an impressive mausoleum of the Julii family, both still standing.
In the 1st century BC, under the Romans, the city built a new forum, temples, and a curved stone arch dam, Glanum Dam, the oldest known dam of its kind, and an aqueduct, which supplied water for the towns fountains and public baths.
Glanum was not as prosperous as the Roman colonies of Arles, Avignon and Cavaillon, but by the 2nd century AD it was wealthy enough to build impressive shrines to the Emperors, to enlarge the forum, and to have extensive baths and other public buildings clad in marble.
Glanum did not survive the collapse of the Roman Empire. The town was overrun and destroyed by the Alamanni in 260 AD and subsequently abandoned, its inhabitants moving a short distance north into the plain to found a city that eventually became modern day Saint-Rémy-de-Provence.
The Mausoleum of the Julii, located across the Via Domitia, to the north of, and just outside the city entrance, dates to about 40 BCE, and is one of the best preserved mausoleums of the Roman era.
The triumphal arch stood just outside the northern gate of the city, next to the mausoleum and was the visible symbol of Roman power and authority. It was built near the end of the reign of Augustus Caesar (who died in 14 AD). The upper portion of the arch, including the inscription, are missing.
The sculptures decorating the arch illustrated both the civilization of Rome and the dire fate of her enemies.References:
The Amphitheatre of the Three Gauls was part of the federal sanctuary of the three Gauls dedicated to the cult of Rome and Augustus celebrated by the 60 Gallic tribes when they gathered at Lugdunum (Lyon). The amphitheatre was built at the foot of the La Croix-Rousse hill at what was then the confluence of the Rhône and Saône.
Excavations have revealed a basement of three elliptical walls linked by cross-walls and a channel surrounding the oval central arena. The arena was slightly sloped, with the building"s south part supported by a now-vanished vault. The arena"s dimensions are 67,6m by 42m. This phase of the amphitheatre housed games which accompanied the imperial cult, with its low capacity (1,800 seats) being enough for delegations from the 60 Gallic tribes.
The amphitheatre was expanded at the start of the 2nd century. Two galleries were added around the old amphitheatre, raising its width from 25 metres to 105 metres and its capacity to about 20,000 seats. In so doing it made it a building open to the whole population of Lugdunum and its environs.