Terni was one of the first cities to adopt the consular and
arengo system of the people. In 1159, at the beginning of the conflict between
Frederick Barbarossa and
Alexander III, the city's development had to come to a halt due to the feudal investiture in favor of the brothers of Cardinal Ottaviano Monticelli (of noble lineage, his household being that of the Cesi family of Narni), imposed by the emperor, who elevated the cardinal to the role of antipope. To further the antipope's kinship, Frederick I endowed the two brothers of Cardinal Octavian with the feudality of Terni. The people of Terni managed, with the help of the legitimate pope, to "shake them off." A few years later, although the city managed to free itself and return to normality, its early years as a medieval municipality were shaken by a second shock in March or April 1174, when Terni - accused of not paying the taxes due - was destroyed by the army of the imperial legate Archbishop
Christian of Mainz, Frederick Barbarossa's most ruthless collaborator in subduing pro-papal cities. Only the decisive annexation of the entire Duchy of Spoleto by
Pope Innocent III in 1198 succeeded in making Terni a piece of the
Patrimony of St. Peter in Tuscia. In 1218,
Honorius III reconstituted the Cathedral Chapter in the church of St. Mary of the Assumption, but endowed it with very little territorial jurisdiction, exposed to the claims, on the one hand of Narni, on the other of Spoleto, which was supported by the Roman families, especially the
Crescenzi, who at that time set upon Narni for their incursions or claims in Umbria, especially in the basin that had always been Terni's domain. then of churches and real convents especially in urban areas, as also happened in the neighboring fiefs (or autonomous small fortified villages) of Stroncone, Piediluco, Sangemini and Acquasparta for the
Minorites, in the nearby rival city of Narni for
Friars Minor,
Augustinians and
Dominicans. In June 1241, the nobility of Germanic origin of Terni, with all its citizens, spontaneously submitted to
Frederick II, who singled it out as the basis of his presence in Central Italy during the conflict that opposed him, in 1244, to
Pope Innocent IV. The emperor stayed in the vicinity of Terni between the summer of 1244 and March 1245; he waited in vain for Innocent IV, who had in the meantime fled, first to
Genoa, then to
Lyon, but he conducted with Cardinal Ottone di Porto, halted in Narni, who remained faithful to the pope, negotiations on the arrangement of mutual spheres of influence in Lombardy. Also in Terni he received Albert,
Patriarch of the Antiochian church, who attempted mediation between Frederick and Cardinal Deacon Ranieri, of S. Maria in Cosmedin, who was leading, especially in Tuscia, an incessant guerrilla warfare against the Emperor's Arab troops. He returned to Terni in 1247 and apparently convened in the city the diet that would designate his son
Henry to succeed him. However, with the death of the sovereign Terni reverted to a kind of papal semi-subjugation, although it continued not without rebellion and warfare to fight against the political and jurisdictional centralization of Rome, becoming a papal city very late, in 1564, later than
Perugia. In 1294 the municipality endowed itself with a new office, the
quattro di credenza or defenders of the People, and in 1307 of the Priors. The establishment of these two magistracies were prompted by the growing influence that members of the arts and trades, such as, for example, wool workers, blacksmiths, dyers, and merchants, had acquired within a community dominated by landowners and
milites. During the
Avignon Papacy it continued its resistance to papal power and, squeezed between two allied municipalities such as Spoleto and Narni, was forced to ally with Todi, which appointed between 1338 and 1354 seven out of ten
Podestas. In 1340 the battle near the hill known as Colleluna, saw Terni's army clash with its ally
Amelia against the papal army to defend its economic independence. In 1354 the city submitted itself to the
papal legate, Cardinal
Egidio Albornoz, upon payment of five hundred
florins annually for ten years, a very mild condition compared to those reserved for other municipalities of the Patrimony. At the beginning of the 15th century, it fell under the seigniory of Andrea Tomacelli, one of the brothers of
Pope Boniface IX, who, as podestà of Terni, vainly attempted to make it a stronghold of resistance against the expansionist aims of the
Visconti. Between 1408 and 1415 it hosted the allied troops of
Ladislaus I of Naples, who supported it in its operations against rival Spoleto. In 1417 it was subject to the lordship of
Braccio da Montone, but in 1421 mercenaries in the pay of
Pope Martin V brought it back under papal power. The occupation in 1434 by
Francesco Sforza's troops was only a sporadic episode in the context of the war for supremacy between
Florence and
Milan. Terni then had between six and seven thousand inhabitants and was a very developed and wealthy city, prosperous because due to the capitalism that was springing up on the back of flourishing trade and a growing manufacturing activity it had reached splendors that were in no way inferior to other cities. All this was favored by the presence alongside the
Nera and Serra, of a series of minor waterways, the so-called
forme, which activated: mills (a large number of about five hundred active), branch mills and paper mills (and which all the more justified the name of Interamna). Much of the activity of the city government was reserved for matters of a hydrological nature (Marmore, rivers and city canals). At the same time the city was enriched by an increasingly affluent and highly industrious merchant bourgeoisie that equaled in pomp and wealth the nobles. A very important aspect related to building in Terni between the late Middle Ages and the early modern age is the activity of workers coming from
Lombardy: the long series of contracts stipulated with masters of Como or of Mediolanum, who, in addition to the rare public contracts, worked on private commissions, testifies to a practice established during the 15th century and still widespread in the 16th century. At the head of the Terni municipal apparatus stood six
priors (in monthly office), with broad political and administrative powers. The legislative and advisory bodies were: the Council of Credenza (or of Cerna), composed, in addition to the Priors, of the Twenty-four of the people (as many per borough, or district, which were six: Fabri, Castello, Rigoni, Aultrini, Disotto, Amingoni), each of whom carrying a flag were called
Banderari (hence the origin of the name of this social class); and twenty-four
Boni viri. Between 1444 and 1448, first
Eugenius IV, then
Nicholas V modified the municipal statutes and attempted to introduce in Terni, as in other parts of the Patrimony, the Governorship, thus trying to give a centralizing imprint to the papal administration. However, such subservience did not come about. In 1446 some clarifications about the powers and duties of the city priors were deliberated, and directives for the preservation of documents were issued, including the "
brief" of Pope Benedict III. Serious riots broke out in Terni in July 1477, due to the insipience of the papal governor of Terni and Rieti, the bishop of
Cervia Achille Mariscotti, resident in Rieti, and his weak vicar in Terni, the young and inexperienced Francesco Colozzi. The latter, insulted by some young men from Terni, asked for help from his superior, who showed up in the city fully armed and followed by a gang of thugs, with whom he started a series of clashes in the streets of the city, from which resulted eight dead and many wounded, on both sides; the governor was forced into a less than honorable escape, risking being lynched together with his vicar by the enraged population. At the same time the Lordship of Todi had armed clashes with Terni, which, with a provision of 3,000
florins a month, hired Captain Corrado d'Alviano (uncle of the well-known
condottiere Bartolomeo d'Alviano). The strife ended in 1449, when the Chiaravalle of Todi placed their castles of Canale and Laguscello under the jurisdiction of the Municipality of Terni, obligating themselves to recognize its military dominion with the annual offering of a pallium worth eight
gold ducats.
Andrea di Gioannuccio Castelli In the late 1300s and early 1400s, Andrea di Joannuccio (or Gioannuccio), leader and lord of the Ghibellines of Terni and a prominent member of the Castelli, gained power and prestige in the city. He was a high-profile figure throughout central Italy, following his
podestà positions held in Fermo and Siena, where he was honored with the title of
Magnificus Miles de Interamna. By
Pope Boniface IX he was appointed "
Magnifico et potenti viro Andrea Jannutij de Castellis," podestà of Perugia. Having finished his post in this city, where among other things he was offered an extension in the podestà office, but which he declined, he returned to Terni, to look after the rich patrimony and numerous family possessions. Andrea also placed himself at the center of several episodes of Terni political life, such as the election of the podestà, the exile of the Guelphs, and the recovery of some abandoned fortresses in the countryside. It was in this context that
Braccio da Montone, in the service of the
antipope Alexander V, besieged the Ghibelline Terni on September 14, 1410, which at first resisted "heroically" (according to chroniclers), except for surrendering at the next untenable siege in June, due in part to the scarcity of external support and above all to the divergences that suddenly came about between the two allied Ghibelline families that divided power in the city, namely the Castelli, precisely, and the Camporeali. Braccio, who at that time had also taken possession of Rome, demanded to take possession of the suburban fortresses of Terni, and in the context of this conflict had Andrea Castelli and his sons, who militarily and politically dominated the city with the blessing and support of Ladislaus king of Naples, his adversary, assassinated after misleading them. Several years later, in 1424, Andrea's nephew Andreasso, the only male survivor of the family massacre, allegedly caused the death of Braccio, who had already been wounded after the
War of L'Aquila, thus avenging his relatives, according to an oral tradition. == The early 1500s ==