Oderzo (Latin: Opitergium) is a town and comune in the province of Treviso, Veneto, northern Italy.It lies in the heart of the Venetian plain, about 66 kilometres (41 miles) to the northeast of Venice. Oderzo is traversed by the Monticano River, a tributary of the Livenza.The centro storico, or town center, is rich with archeological ruins which give insight into Oderzo's history as a notable crossroad in the Roman Empire.