 The village was formed in the beginnings of the 14th century, when the residents of nearby settlements who survived the looting during the War of the Sicilian Vespers (1282–1302), took refuge around the church of St. Maurus and created a new village.Its toponym, meaning "Lower Farmhouse", is closely related to the one of the nearby and upper town of San Mauro Cilento, also named Casalsoprano (i.e.