 'Avignonese exile of the popes, vicars of the Holy See who govern through a commissioner.In January 1378, the municipality of Stroncone, a small "walled wall" in the diocese of Narni, was recognized by Gregory XI as the privilege of land immediately subject to the Holy See, an area of freedom which was then confirmed to him at the beginning of ' modern age by Leo X.According to Lanzi, in 1394 the fort was occupied by Pandolfo Malatesta and in 1404 by Andrea Tomacelli