HISTORY OF VICENZA 900 TO 1500
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 old rivalry with Padua, Bassano, and other cities was renewed, besides which there were the internal factions of the Vivaresi ( Ghibellines) and the Maltraversi ( Guelphs). The tyrannical Ezzelino III from Bassano drove the Guelphs out of Vicenza, and caused his brother, Alberico, to be elected podestà (1230).
The independent commune joined the Second Lombard League against Emperor Frederick II, and was sacked by that monarch (1237), after which it was annexed to Ezzelino's dominions. On his death the old oligarchic republic political structure was restored a consiglio maggiore ("grand council") of four hundred members and a consiglio minore ("small council") of forty members and it formed a league with Padua, Treviso and Verona. Three years later the Vicentines entrusted the protection of the city to Padua, so as to safeguard republican liberty; but this protectorate quickly became dominion, and for that reason Vicenza in 1311 submitted to the Scaligeri lords of Verona, who fortified it against the Visconti of Milan. Vicenza came under rule of Venice in 1404, and its subsequent history is that of Venice. It was besieged by the Emperor Sigismund, and Maximilian I held possession of it in 1509 and 1516.