provincial capital of Germania Superior, and had an important funeral monument dedicated to Drusus, to which people made pilgrimages for an annual festival from as far away as Lyon. Among the famous buildings were the largest theatre north of the Alps and a bridge across the rhine.
Alamanni forces under Rando sacked the city in 368. From the last day of 405 or 406, the Siling and Asding Vandals, the Suebi, the Alans, and other Germanic tribes crossed the Rhine, possibly at Mainz. Christian chronicles relate that the bishop, Aureus, was put to death by the Alamannian Crocus. The way was open to the sack of Trier and the invasion of Gaul.
Throughout the changes of time, the Roman castrum never seems to have been permanently abandoned as a military installation, which is a testimony to Roman military judgement. Different structures were built there at different times. The current citadel originated in 1660, but it replaced previous forts. It was used in World War II. One of the sights at the citadel is still the cenotaph raised by legionaries to commemorate their Drusus.
Through a series of incursions during the 4th century Alsace gradually lost its Belgic ethnic character of formerly Germanic tribes among Celts ruled by Romans and became predominantly influenced by the Alamanni. The Romans repeatedly reasserted control; however, the troops stationed at Mainz became chiefly non-Italic and the emperors had only one or two Italian ancestors in a pedigree that included chiefly peoples of the northern frontier.
The last emperor to station troops serving the western empire at Mainz was Valentinian III, who relied heavily on his Magister militum per Gallias, Flavius A�tius. By that time the army included large numbers of troops from the major Germanic confederacies along the Rhine, the Alamanni, the Saxons and the Franks. The Franks were an opponent that had risen to power and reputation among the Belgae of the lower Rhine during the 3rd century
