Prehistory The earliest human traces appear in the northern sector of the municipal territory. Along the Camporeale Saddle, numerous and diverse chipped
flint tools, attributable to the
Mousterian industry practiced in the
Middle Paleolithic by
Neanderthal hunter-gatherers, have been found on the surface or just below it. The first stable agro-pastoral settlement, the oldest in the region, emerges on the chalky cliff of La Starza, near a perennial spring at its base. There, remnants of an entire village of huts from the
Lower Neolithic have been uncovered, occupied continuously until the threshold of the
Iron Age. Evidence from the Middle-Upper Neolithic also surfaces elsewhere (in the localities of
Acquazzuolo, Santa Maria a Tuori, Trimonti), extending to the southern part of the rural area (on the
San Marco hillock near the Fiumarelle stream).
Protohistory The initial
Apennine peoples give way to the
Hirpini, a warlike
Italic tribe of
Samnite ethnicity and
Oscan language, who settled the territory in pre-Roman times. To this civilization belong the varied artistic pottery (including the
kantharos type) found in the burial goods of small local necropolises, linked to the so-called
Casalbore-Castelbaronia culture (6th–5th centuries BC), typical of northern Irpinia.
Early Middle Ages The repeated
Barbarian invasions of the 5th and 6th centuries precipitated the rapid decline of ancient
villae and other scattered settlements. From the mid-9th century, however, the Principality of Benevento fell into crisis, first suffering the devastating effects of the 847 earthquake (which also damaged the original
Ariano Cathedral), followed by the secession of
Salerno and subsequent
Saracen raids (reaching the Ariano countryside in 858), and finally subjugation to
Capua after a period of Byzantine occupation (likely involving the Gastaldate of Ariano in 891–895). Around 988, another earthquake devastated both the County of Ariano (which had replaced the
gastaldate) and Benevento. Between 1016 and 1022, amid an increasingly unstable sociopolitical context, the county was usurped by a band of
Norman knights led by
Gilbert Buatère, hired by
Melus of Bari, a Lombard noble appointed
Duke of Apulia (in an anti-Byzantine role) by Emperor
Henry II. This marked the birth of the first Norman dominion on Italian soil. In the ensuing decades, thanks to the victorious
Norman conquest of southern Italy, Ariano assumed a position of paramount importance: the castle was fortified, and the city was established as the head of a vast county. Even the 1125 earthquake appeared to cause minimal damage, except in some outlying areas. During this historical phase,
Ottone Frangipane (died 1127) lived and worked in Ariano, later canonized and chosen as the town’s patron saint. In 1140, King
Roger II, after ousting the last grand count, took up residence in the stronghold and promptly convened the
Assizes of Ariano. Before the general assembly (
curia procerum) of the
Duchy of Apulia and Calabria, the king ordered a new coin to be minted (the
ducale, better known as the
ducat), promulgated an extensive series of legislative acts, and, according to established historiographical tradition, issued the statutes (
constitutiones) of the
Kingdom of Sicily. This legislative corpus, a synthesis of various distinguished legal traditions, was later adopted with minor amendments in the
Constitutions of Melfi. Fortified with sturdy walls and a substantial arsenal (
"royal chamber"), Ariano resisted fiercely until a large contingent of
Luceran soldiers, posing as deserters from Manfred’s forces, were allowed into the fortress. That night, they revealed their true intent, pillaging and burning buildings while massacring the inhabitants in the infamous
Carnale massacre. In 1269,
Charles I of Anjou, having defeated Manfred at the
Battle of Benevento and seized the kingdom, resolved to rebuild the city, now deemed significant (
"famous"). In recognition of its loyalty to the papacy, he gifted the
Diocese of Ariano two Holy Thorns (given to him by his brother
Louis IX of France), still preserved in the Museum of Silver. and possibly others. For extended periods,
Monteleone was also a hamlet of Ariano. From 1294 to 1413, the county was governed by members of the
Sabran family; notable among them were
Saint Elzéar and his wife
Delphine, later venerated as co-patrons. After suffering severe damage from the
1349 earthquake, the city felt the strain of the early 15th-century struggle between the Angevins and
Aragonese for control of the
Kingdom of Naples. In 1417, the county passed to
Francesco Sforza, a
condottiero and future
Duke of Milan, and in 1440, it was granted by King
Alfonso to the grand
seneschal Innico de Guevara, one of his finest generals during the kingdom’s conquest. Along with the rest of the realm, the city was then devastated by the
1456 earthquake and the 1458 plague. This occurred nearly midway through Aragonese rule, which lasted until 1485 when Pietro, Innico’s son, lost the county due to his involvement in the
Conspiracy of the Barons. The city returned to the
royal domain for a decade. the conflicts persisted for decades, inflicting immense damage both within the city walls (where even church bells were melted down to make weapons) and in the countryside (where olive and other trees were cut down to fuel the foundries). In 1528, the populace was punished by imperial forces for its alleged pro-French stance, enduring a sack. As compensation for these misfortunes, the city received the
royal privilege to establish several annual fairs to be held
in perpetuity. Yet the
feudal regime was nearing its end: on August 2, 1585, at great cost, Ariano redeemed itself, was reintegrated into the
royal domain, and became a royal city—the only one in the Principato Ultra—and thus came directly under the control of the
Viceroys of Naples. In 1639, a protracted legal dispute arose when the city, although owned by the State, was enfeoffed to the Duke Carlo Antonio Guevara of
Bovino. The ruling from the
Supreme Council of Italy, favoring the citizens, arrived only twenty-three years later. In 1647–48, the populace staunchly resisted the
Masaniello uprisings but succumbed to siege and plunder by Neapolitan rebels for blocking their grain shipments from Apulia. The
plague of 1656, which decimated the population, wiped out entire villages (including the hamlet of Corsano, in the
diocese of Ariano). Within decades, a severe seismic crisis followed: the
1688 Sannio earthquake was succeeded by the
1694 Basilicata earthquake, the 1702 Benevento earthquake, and the
1732 Irpinia earthquake. Nevertheless, positioned at the pass of the newly upgraded Royal Road of the Puglie, the city soon regained its pivotal role, hosting the Royal Consulate of Commerce from 1743–46 (with jurisdiction over 64 municipalities) and, from 1806, the Ariano District. This triggered a new phase of slow but steady demographic growth. Much of the population remained loyal to the
Bourbons, resisting the
Risorgimento movements but later falling prey to
brigandage.
Contemporary era In the post-unification period, the city served as the seat of the Ariano di Puglia District, abolished in 1926. A few years later, in 1930, the territory was struck by the
1930 Vulture earthquake. During
World War II, when a
Fascist internment camp was established on the outskirts of the city, Allied bombing targeted even the train station, though the population reached its historical peak in the postwar years. Damaged by the
1962 Irpinia earthquake (preceded by a warning tremor), the city was later impacted by the
1980 Irpinia earthquake, which, among other losses, caused the collapse of the
cathedral’s bell tower onto the adjacent square (miraculously sparing the many passersby). In response to these calamities, urban expansion progressed along the peripheral slopes, though this was not matched by population growth.
Symbols The municipal coat of arms and
gonfalon were officially recognized by a decree of the President of the Republic on June 12, 1984. The gonfalon is a vertically divided banner of green and white.
Honors == Monuments and places of interest ==