 The neighboring municipalities are Caorle, Fossalta di Portogruaro, Latisana, Lignano Sabbiadoro, Morsano al Tagliamento, Portogruaro, Ronchis and Varmo .The first traces of human settlement date back to the 4th and 3rd centuries BC, when the area (now part of the municipality of San Michele al Tagliamento) was populated by the Adriatic Veneti.From 181 AC onward, the Romans' colonization marked the beginning of the land reclamation and agricultural development of the entire area.