The history of the current Castellabate is tied to Saint Costabile Gentilcore (St. Constabilis), fourth abbot of La Trinità della Cava. In 1123, the same year in which he was elevated to the position of abbot, he started construction on the Angel's Castle (10 October 1123), which afterwards became entitled to him. His title gave the village its present name: Castrum Abbatis, Latin for "the castle of the abbot".