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 (custodia) 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.
Modern age
Vicenza was a candidate to host the Council of Trent.
The 16th century was the time of Andrea Palladio, who left many outstanding examples of his art with palaces and villas in the city's territory, which before Palladio's passage, was arguably the most downtrodden and esthetically lacking city of the Veneto.
After 1797, under Napoleonic rule, it was made a duché grand-fief (not a grand duchy, but a hereditary (extinguished in 1896), nominal duchy, a rare honor reserved for French officials) within Bonaparte's personal Kingdom of Italy for general Caulaincourt, also imperial Grand-Écuyer.
After 1814, Vicenza passed to the Austrian Empire. In 1848, however, the populace rose against
