The ancient Trebe (house), mentioned by Pliny, soon became a Roman municipality. In the early Middle Ages, the inhabitants had to withdraw behind the circle of Roman walls, and it was only in 1264 that he the new circle was built that still surrounds much of the city.
The Cathedral of Sant'Emiliano (12th century) is worth visiting. It houses the altar of the Sacrament with the rich decoration of Rocco Tommaso (1522), while the Church of St. Francis (Francesco), dated 1288, houses a Giotto-style crucifix on board dating from the early fourteenth century.
In the adjoining monastery, you can visit the Art Gallery and Oil Museum. If you can, don’t miss the last Sunday of each month’s "Flea" market in the town square and characteristic streets of the town centre.