 Stroncone was, in fact, in a border area between the Longobard Duchy of Spoleto and the territory under the control of the Byzantines.Right from the name of one of the Dukes of Spoleto, Ugo, it would derive that of the center, obtained from the original "castrum Hugonis", corrupted in "Castrugone", "Strungone" and finally "Stroncone".The first document attesting to the existence of the residence dates back to 1012, when Giovanni di Pietro gave to the monastery of San Simeone his possessions located in the territory of Stroncone, the houses and casalini that he owns within the "castle" of Stroncone and his portion of the church of Sant'Angelo, which is called "oratory" on this date.