 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.The documents from the XI century confirm the existence of a well-defined settlement, a true castle, with fortifications and walls, inside which there are houses, a square, and worship buildings.During this period, Stroncone is gravitating to Narni's orbit, as well as being part of the diocesan territory of this city.