Until the early Middle Ages, the historical events of the Zoldo Valley are unknown. Probabily, during prehistoric times this area was not inhabited on a permanent basis, and the same it happened in pre-Roman or Roman times. About this last period there are three inscriptions, around the Civetta, that could indicate the borders between the territories of Iulium Carnicum and Bellunum. For centuries then the Zoldo Valley was a border area and later the frontier between the territories of Belluno (to which it belonged) and Cadore.
As already mentioned, even the early Middle Ages were a mysterious time and the few recorded events are essentially legends. Maybe under the Lombards the first embryo of the system of the Rules appeared, lasting until the 19th century. Only in 1185 did a Papal Bull quote the Zoldo Valley for the first time, administered by the parish of San Floriano and dependent on the Bishop of Belluno. Then, the territory passed to Ezzelino III da Romano (1249), and then (1347) to the Avoscano. Shortly afterwards Louis 1 of Hungary assigned it to the Da Carraras. Other events finally gave it to Venice (1404) where it remained until the fall of that Republic (1797).