The hill on which the village stands was already inhabited in prehistoric times by Osco-Italic populations, as evidenced by the Pesco district, made of caves, dug into the pediment of the spur called Elceto, by the vegetation of elce present, which later gave its name to the village.
Deliceto was fortified under the Lombards and in the second half of the ninth century the castle was erected, then expanded in Norman and Swabian times. Great impulse to the growth of the village came thanks to Ferdinand I of Aragon who in 1463 granted it in marquisate to his son-in-law Antonio Piccolomini, favorite nephew of Pope Pius II. The Piccolomini, which established an Albanian colony in Deliceto, played a key role in the struggle between Aragonese and Angevins for the supremacy of the Kingdom of Naples.
The discovery of the village begins from the Corso Margherita and continues through alleys and open spaces, where overlook Palazzo Galderisio, Palazzo De Maio, the Churches of San Salvatore, dell'Annunziata and Sant'Anna e Morti.
Beyond the green Valley in Vincoli stands the Sanctuary of Our Lady of Consolation, where Saint Alfonso Maria de' Liguori and Saint Gerardo Maiella lived.