Roman age
Vicentia was settled by the Italic Euganei tribe and then by the Paleo-Veneti tribe in the third and second centuries BC. The Romans allied themselves with the Paleo-Veneti in their fight against the Celtic tribes that populated north-western Italy. The Roman presence in the area grew exponentially over time and the Paleo-Veneti (whose culture mirrored Etruscan and Greek values more so than Celtic ones) were gradually assimilated. In 157 BC, the city was a de facto Roman centre and was given the name of Vicetia or Vincentia, meaning "victorious".
The population of Vicentia received Roman citizenship in 49 BC. The city had some importance as a way-station on the important road from Mediolanum (Milan) to Aquileia, near Tergeste (Trieste), but it was overshadowed by its neighbor Patavium (Padua). Little survives of the Roman city, but three of the bridges across the Bacchiglione and Retrone rivers are of Roman origin, and isolated arches of a Roman aqueduct exist outside the Porta Santa Croce.
During the decline of the Western Roman Empire, Heruls, Vandals, Alaric and his Visigoths, as well as the Huns laid waste to the area, but the city recovered after the Ostrogoth conquest in 489 AD, before passing to Byzantine rule soon after. It was also an important Lombard city and then a Frankish centre. Numerous Benedictine monasteries were built in the Vicenza area, beginning in the sixth century.
Middle Ages
In 899, Vicenza was destroyed by Magyar raiders.
In 1001, Otto III handed over the government of the city to the bishop, and its communal organization had an opportunity to develop, separating soon from the episcopal authority. It took an active part in the League with Verona and, most of all, in the Lombard League (1164–1167) against Emperor Frederick I Barbarossa compelling Padua and Treviso to join: its podestà , Ezzelino II il Balbo, was captain of the league. When peace was restored, however, the
