Its main attraction is the majestic Benedictine Abbey of S. Maria in Sylvis (so named because it was surrounded by an area of extensive woodland (selva)), dating back to the 7th century.

The town, which became important both during the Lombard period and the medieval period when it was part of the Patriarchate of nearby Aquileia, was later built around the complex.

The remains of the abbey complex include the basilica, the solid entrance tower, which is the only “survivor” of the seven defence towers built in the second half of the 10th century, the bell tower and the chancellery, with a large Romanesque façade.