The name "Sant'Angelo" derives from the town's patron saint Michael the Archangel. Lombardi is derived from the Lombards who settled there around 1000 AD. The cathedral was originally built in the 11th century and was rebuilt in the 16th century. Also near the Piazza of Andrea is the castle of the Lombards, built around the first half of the 10th century. Initially it was a jail/prison/fort, and was later modified to serve as a castle. There is a small pathway that was constructed under the castle and from there it leads to the main town square where there lied an underground prison.