Its origins go back to the time of the quarrel between the Lombard principalities of Benevento and Salerno, around AD 850. To defend the borders of the Salerno principality, a small fortress was built that because of its modest size got the name of Turella, from which the present-day name of the town comes.

The castle was mentioned for the first time in a 1151 document as pagus romano.

After the downfall of Conza, due to Roberto il Guiscardo (1076), the feud of Torella passed to the Normans, who divided the territory into counties and baronies. After the Normans came the Suebi, the Angevins and, after, also the Aragoneses. The oldest lords of the village belonged to the Saraceno family.

In the 16th century Torella passed to the Caracciolo family. In 1638, its members where given the title of princes. The appellation “Dei Lombardi” was added after the unification of Italy to differentiate from the Torella “del Sannio”.