 In the area of Castel Giorgio remains from prehistoric settlements, belonging to the Villanovan civilization, were found in 1993.Also present are an Etruscan necropolis (3rd-2nd centuries BC) and remains of Roman villas and roads (Via Traiana Nova and Via Cassia)

The town was founded in 1477, as castle and residence for the bishop of Orvieto, Giorgio della Rovere.After several vicissitudes, the palace was restored by Cardinal Giacomo Sannesio in 1610–1620, turning it into a summer resort for the prelates of Orvieto.