border March, i.e., the Marca Trevigiana, which lasted for several centuries.
Middle Ages
Treviso joined the Lombard League, and gained independence after the Peace of Constance (1183). This lasted until the times when seignories started to impose in northern Italy: among the various families who ruled over Treviso, the Da Romano reigned from 1237 to 1260. Struggles between Guelph and Ghibelline factions followed, with the first triumphant in 1283 with Gherardo III da Camino, date after which Treviso lived a significant economical reprise which lasted until 1312. Treviso and her satellite cities, including Castelfranco Veneto, founded by the Trevigiani in contrapposition to Padua, had become appetible for the neighbouring powers, including the da Carrara and Scaligeri. After the fall of the last Caminesi lord, Rizzardo IV, the Marca was the site of continuous struggles and ravages (1329–1388).
Treviso's notary and physician, Oliviero Forzetta, was an avid collector of antiquities and drawings; the collection was published in a catalog in 1369, the earliest such catalog to exist to this day.
Venetian rule
After a Scaliger domination in 1329–1339, the city gave itself to the Republic of Venice, becoming the first notable mainland possession of the Serenissima. From 1318 it was also, for a short time, the seat of a university. Venetian rule brought innumerable benefits, however, Treviso necessarily became involved in the wars of Venice. From 1381–1384, the city was captured and ruled by the duke of Austria, and then by the Carraresi until 1388. Having returned to Venice, the city was fortified and given a massive line of (still existent) walls and ramparts: these were renewed in the following century under the direction of Fra Giocondo, two of the gates being built by the Lombardi. The many waterways were exploited with several waterwheels which mainly powered mills for milling grain produced locally. The
