The area started to gain importance during the Roman era, especially from 1st century a.C. thanks to the layouts of the Via Annia and Via Postumia and, towards the north, of Via Claudia Augusta. The junction was Julia Concordia, subject to a centuriation which still bears an imprint.
With the fall of Rome and the arrival of the Barbarians, the ancient civilisation was safeguarded by the Abbeys of Summaga and, in particular, of S. Maria in Sylvia, under the patriarchy of Aquileia.
Then came the Republic of Venice, which imposed its power on these lands until 1797. The brief Napoleonic era and the Hapsburg chapter anticipated the annexation to the Kingdom of Italy.
The wounds caused by the events of the First World War were deep; the 1900s stood out also due to the great reclamation and the agricultural development, on the one hand, and the tourism along the coasts and commerce in the countryside on the other.