Paul the Deacon attributes the Lombard hatred for the city to the perfidy of a certain citizen of Oderzo, a "patricius Romanorum" named Gregory, who in 641 while under the promise of a truce beheaded Taso and Cacco, sons of Gisulf, the Lombard duke of Forum Iulium.
In 1943 it was a centre of the civil war between the German puppet Italian Social Republic (RSI) and the partisan resistance.