San Gemini, the original pre-Roman village called Casventum in Roman times, it assumed its current name in the ninth century, when a monaco called Gemine from Syria, I started preaching, teaching and doing good to such an extent as to designate the cittadna as the city of "Holy Gemine" became a township with the favor of the Papacy, and being a vital road junction for communication with Rome from the north, the town became a center of cultural, artistic and religious-notch. I am abbeys of St. Nicholas and St. Gemine, now a cathedral, the churches of St. John, with an ancient baptistery of the eighth century, and St. Francis (XIII century), as well as the Palazzo del Capitano del Popolo and the mighty city walls, still visible in large tracts. Piazza San Francesco, the largest of the city is dominated by the towers of the Palace Canova, testimony to the long stay in San Gemini of the great sculptor.
Numerous other historical relics, such as the chapel of St. Mary de Incertis and the churches of St. Mary Magdalene and St. Stephen's, and architectural treasures such as towers, tower-houses, stairways, arches, ramparts, bridges support austere buildings, as well as the proximity to the remains of the beautiful Roman city of Carsulae and the Baths whose waters bear his name, combine to make San Gemini a jewel filled with wonder and admiration of the visitor who passes through the narrow streets and gradually discovers the various facets. The most important event organized in the country is the reenactment of the Tournament of Arms.