Barbaric Age and ancient middle age
The decay of the late Roman period was also felt in Treviso, though, after the fall of the West Roman Empire and during the reign of Theodoric, the city was still an annonary center of first order. Controversy over the 6th century between Ostrogoths and Byzantines, according to tradition, the city gave birth to Totila, the glorious German military leader who won the Byzantines right at the gates of Treviso. Conquered by the Longobards, it was erected at the seat of one of the thirty-sixth ducats of the kingdom and was endowed with a very big mint. The latter continued to flourish under the Carolingians (under which the local bishop had the title of Count), and still under the Serenissima there was the bagatino.
With the revival of the year 1.000 A.D., Treviso, which was given communal statutes and won the emperor Federico Barbarossa alongside the cities of the Veronese and Lombardy leagues, had a remarkable development, extending in size and enriching with monuments and palaces. The Treviso life became synonymous with a joyful life and the city was engaging in festivals and celebrations such as the Castle of Love. Quoted by Dante Alighieri, who spent part of his exile and Fazio degli Uberti in his Dittamondo, the city grew richer and more prosperous throughout the XII and XIII century by endowing one of the first Universities (1321) and contesting the neighboring Padua and Verona was the principal city of what at the time was called the Trivigiana Brand meaning a good part of the present Veneto.
From Municipal Age to Venetian Republic
Similarly to the main cities of Northern Italy, Treviso witnessed the crisis of the municipal government and the subsequent move to the lordship. It must be borne in mind, however, that from the beginning the power was in fact in the hands of a small aristocratic oligarchy, including some families such as Tempesta. The first house to occupy Treviso was the Ezzelini, who ruled between 1237 and 1260 with the figures of Ezzelino III and Alberico. The city was therefore prey to new intestinal fights between the Guelfi filopapali and the Ghibellini, supporters of a rapprochement with the Empire, so that only in 1283, following the victory of the first, a decisive economic and cultural recovery lasted until the 1312. Dominated by Collalto and Da Camino, the Marca was still involved in wars and looting in 1329-1388. First occupied by the Scaliger (1329-1339), in 1339 spontaneously gave way to the Serenissima, and became the first property on the mainland. Involved in the wars for primacy on the Italian peninsula, the city was ruled by the Duke of Austria between 1381 and 1384 to pass, in 1384 and until 1388, to Carraresi. Only then the city returned definitively to the Republic of Venice.
Finally, under Venice, Treviso enjoied a long period of stability and well-being, except for the parentheses of the Cambrai League War that saw the construction of the current fortifications (1509) and the imperial and French siege, removed in 1511.