 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.In order to counter the expansive policy of the municipality of Narni, perpetually disputed with the municipalities of Terni and Rieti, and with the aim of restructuring the Pontifical State, Innocent III will grant Stroncone municipal autonomy in 1215 (LANZI 1895).