Antiquity and Middle Ages Traces of human habitation in the area of Bologna go back to the 3rd millennium BCE, with significant settlements from about the 9th century BCE (
Villanovan culture). The influence of
Etruscan civilization reached the area in the 7th to 6th centuries, and the Etruscan city of
Felsina was established at the site of Bologna by the end of the 6th century. By the 4th century BCE, the site was occupied by the
Gaulish Boii, and it became a Roman colony and
municipium with the name of
Bonōnia in 196 BCE. During the waning years of the Western Roman Empire Bologna was repeatedly sacked by the
Goths. It is in this period that legendary Bishop
Petronius, according to ancient chronicles, rebuilt the ruined town and founded the
basilica of Saint Stephen. Petronius is still revered as the patron saint of Bologna. In 727–728, the city was sacked and captured by the
Lombards under
King Liutprand, becoming part of that kingdom. These Germanic conquerors built an important new quarter, called
addizione longobarda (Italian meaning 'Longobard addition') near the complex of St. Stephen. In the last quarter of the 8th century,
Charlemagne, at the request of
Pope Adrian I, invaded the Lombard Kingdom, causing its eventual demise. Occupied by Frankish troops in 774 on behalf of the papacy, Bologna remained under imperial authority and prospered as a frontier
mark of the
Carolingian empire. Bologna was the center of a revived study of law, including the scholar
Irnerius ( – after 1125) and his famous students, the
Four Doctors of Bologna. Bologna boasts of having one of the oldest universities in the western world (
University of Bologna), with a continuous operation since 1088, and the first university in the sense of a higher-learning and degree-awarding institute. The medical school was especially renowned. By 1200, Bologna was a thriving commercial and artisanal centre of about 10,000 people. and
Ghibelline factions in Bologna, from the
Croniche of Giovanni Sercambi of Lucca After the death of
Matilda of Tuscany in 1115, Bologna obtained substantial concessions from Emperor
Henry V. However, when
Frederick Barbarossa subsequently attempted to strike down the deal, Bologna joined the
Lombard League, which then defeated the imperial armies at the
Battle of Legnano and established an effective autonomy at the
Peace of Constance in 1183. Subsequently, the town began to expand rapidly and became one of the main commercial trade centres of northern Italy thanks to a system of canals that allowed barges and ships to come and go. During a campaign to support the imperial cities of
Modena and
Cremona against Bologna,
Frederick II's son, King
Enzo of Sardinia, was defeated and captured on 26 May 1249 at the
Battle of Fossalta. Although the emperor demanded his release, Enzo was thenceforth kept a knightly prisoner in Bologna, in a palace that came to be named
Palazzo Re Enzo after him. Every attempt to escape or to rescue him failed, and he died after more than 22 years in captivity. After the death of his half-brothers
Conrad IV in 1254,
Frederick of Antioch in 1256 and
Manfred in 1266, as well as the execution of his nephew
Conradin in 1268, he was the last of the
Hohenstaufen heirs. During the late 13th-century, Bologna was affected by political instability when the most prominent families incessantly fought for the control of the town. The free commune was severely weakened by decades of infighting, allowing the pope to impose the rule of his envoy Cardinal
Bertrand du Pouget in 1327. Du Pouget was eventually ousted by a popular rebellion and Bologna became a
signoria under Taddeo Pepoli in 1334. By the arrival of the
Black Death in 1348, Bologna had 40,000 to 50,000 inhabitants, reduced to just 20,000 to 25,000 after the plague. In 1350, Bologna was conquered by archbishop
Giovanni Visconti, the new lord of Milan. But following a rebellion by the town's governor, a renegade member of the Visconti family, Bologna was recovered by the papacy in 1363 by Cardinal
Gil Álvarez Carrillo de Albornoz after a long negotiation involving a huge indemnity paid to
Bernabò Visconti, Giovanni's heir, who died in 1354. 's
History of Bologna, 1590, showing the two surviving towers and several others It was only towards the end of the 16th century that severe signs of decline began to manifest. A series of plagues in the late 16th to early 17th century reduced the population of the city from some 72,000 in the mid-16th century to about 47,000 by 1630. During the
1629–1631 Italian plague alone, Bologna lost up to a third of its population. In the mid-17th century, the population stabilized at roughly 60,000, slowly increasing to some 70,000 by the mid-18th century. The economy of Bologna started to show signs of severe decline as the global centres of trade shifted towards the Atlantic. The traditional silk industry was in a critical state. The university was losing students, who once came from all over Europe, because of the illiberal attitudes of the Church towards culture (especially after the
trial of Galileo). Bologna continued to suffer a progressive deindustrialisation also in the 18th century. In the mid-1700s,
Pope Benedict XIV, a Bolognese, tried to reverse the decline of the city with a series of reforms intended to stimulate the economy and promote the arts. However, these reforms achieved only mixed results. The pope's efforts to stimulate the decaying textile industry had little success, while he was more successful in reforming the tax system, liberalising trade and relaxing the oppressive system of censorship. The economic and demographic decline of Bologna became even more noticeable starting in the second half of the 18th century. In 1790, the city had 72,000 inhabitants, ranking as the second largest in the Papal States; however, this figure had remained unchanged for decades.
Modern history Napoleon entered Bologna on 19 June 1796. Napoleon briefly reinstated the ancient mode of government, giving power to the
Senate of Bologna, which however had to swear fealty to the short-lived
Cispadane Republic, created as a
client state of the
French First Republic at the congress of Reggio (27 December 1796 – 9 January 1797) but succeeded by the
Cisalpine Republic on 9 July 1797, later by the
Italian Republic and finally the
Kingdom of Italy. After the fall of Napoleon, the
Congress of Vienna of 1815 restored Bologna to the
Papal States. Papal rule was contested in the
uprisings of 1831. The insurrected provinces planned to unite as the
Province Italiane Unite with Bologna as the capital.
Pope Gregory XVI asked for
Austrian help against the rebels.
Metternich warned French king
Louis Philippe I against intervention in Italian affairs, and in the spring of 1831, Austrian forces marched across the Italian peninsula, defeating the rebellion by 26 April. By the mid-1840s, unemployment levels were very high and traditional industries continued to languish or disappear; Bologna became a city of economic disparity with the top 10 percent of the population living off rent, another 20 percent exercising professions or commerce and 70 percent working in low-paid, often insecure manual jobs. The Papal census of 1841 reported 10,000 permanent beggars and another 30,000 (out of a total population of 70,000) who lived in poverty. In the
revolutions of 1848 the Austrian garrisons which controlled the city on behalf of the pope were temporarily expelled, but eventually came back and crushed the revolutionaries. Papal rule finally ended in the aftermath of
Second War of Italian Independence, when the French and Piedmontese troops expelled the Austrians from Italian lands, on 11 and 12 March 1860, Bologna voted to join the new
Kingdom of Italy. In the last decades of the 19th century, Bologna once again thrived economically and socially. In 1863 Naples was linked to Rome by railway, and the following year Bologna to Florence. Bolognese moderate agrarian elites, that supported liberal insurgencies against the papacy and were admirers of the British political system and of free trade, envisioned a unified national state that would open a bigger market for the massive agricultural production of the Emilian plains. Indeed, Bologna gave Italy one of its first prime ministers,
Marco Minghetti. After
World War I, Bologna was heavily involved in the
Biennio Rosso socialist uprisings. As a consequence, the traditionally moderate elites of the city turned their back on the progressive faction and gave their support to the rising
Fascist movement of
Benito Mussolini.
Dino Grandi, a high-ranking Fascist party official and Ministry of Foreign Affairs, remembered for being an Anglophile, was from Bologna. During the
interwar years, Bologna developed into an important manufacturing centre for food processing, agricultural machinery and metalworking. The Fascist regime poured in massive investments, for example with the setting up of a giant tobacco manufacturing plant in 1937.
World War II Bologna suffered extensive damage during
World War II. The strategic importance of the city as an industrial and railway hub connecting northern and central Italy made it
a target for the Allied forces. On 24 July 1943, a massive aerial bombardment destroyed a significant part of the historic city centre and killed about 200 people. The main railway station and adjoining areas were severely hit, and 44% of the buildings in the centre were listed as having been destroyed or severely damaged. The city was heavily bombed again on 25 September. The raids, which this time were not confined to the city centre, left 2,481 people dead and 2,000 injured. By the end of the war, 43% of all buildings in Bologna had been destroyed or damaged. After the
armistice of 1943, the city became a key centre of the
Italian resistance movement. On 7 November 1944, a pitched battle around
Porta Lame, waged by partisans of the 7th Brigade of the ''Gruppi d'Azione Patriottica
against Fascist and Nazi occupation forces, did not succeed in triggering a general uprising, despite being one of the largest resistance-led urban conflicts in the European theatre. Resistance forces entered Bologna on the morning of 21 April 1945. By this time, the Germans had already largely left the city in the face of the Allied advance, spearheaded by Polish forces advancing from the east during the Battle of Bologna which had been fought since 9 April. First to arrive in the centre was the 87th Infantry Regiment of the Friuli Combat Group under general Arturo Scattini, who entered the centre from Porta Maggiore'' to the south. Since the soldiers were dressed in British outfits, they were initially thought to be part of the allied forces; when the local inhabitants heard the soldiers were speaking Italian, they poured out onto the streets to celebrate.
Cold War period In the post-war years, Bologna became a thriving industrial centre as well as a political stronghold of the
Italian Communist Party. Between 1945 and 1999, the city was helmed by an uninterrupted succession of
mayors from the PCI and its successors, the
Democratic Party of the Left and
Democrats of the Left, the first of whom was
Giuseppe Dozza. At the end of the 1960s the city authorities, worried by massive
gentrification and suburbanisation, asked Japanese
starchitect Kenzo Tange to sketch a master plan for a
new town north of Bologna; however, the project that came out in 1970 was evaluated as too ambitious and expensive. Eventually the city council, in spite of vetoing Tange's master plan, decided to keep his project for a
new exhibition centre and business district. At the end of 1978 the construction of a tower block and several diverse buildings and structures started. In 1985 the headquarters of the regional government of
Emilia-Romagna moved in the new district. In 1977, Bologna was the scene of
rioting linked to the
Movement of 1977, a spontaneous political movement of the time. The police shooting of a far-left activist,
Francesco Lorusso, sparked two days of street clashes. On 2 August 1980, at the height of the "
years of lead", a terrorist bomb was set off in the central railway station of Bologna killing 85 people and wounding 200, an event which is known in Italy as the
Bologna massacre. In 1995, members of the
neo-fascist group
Nuclei Armati Rivoluzionari were convicted for carrying out the attack, while
Licio Gelli—Grand Master of the underground Freemason lodge
Propaganda Due (P2)—was convicted for hampering the investigation, together with three agents of the secret military intelligence service
SISMI (including
Francesco Pazienza and
Pietro Musumeci). Commemorations take place in Bologna on 2 August each year, culminating in a concert in the main square.
21st century In 1999, the long tradition of left-wing mayors was interrupted by the victory of independent centre-right candidate
Giorgio Guazzaloca. However, Bologna reverted to form in 2004 when
Sergio Cofferati, a former trade union leader, unseated Guazzaloca. The next centre-left mayor,
Flavio Delbono, elected in June 2009, resigned in January 2010 after being involved in a corruption scandal. After a 15-month period in which the city was administered under
Anna Maria Cancellieri (as a state-appointed
prefect),
Virginio Merola was elected as mayor, leading a left-wing coalition comprising the
Democratic Party,
Left Ecology Freedom and
Italy of Values. In
2016, Merola was confirmed mayor, defeating the conservative candidate,
Lucia Borgonzoni. In 2021, after ten years of Merola's mayorship, one of his closest allies,
Matteo Lepore,
was elected mayor with 61.9% of votes, becoming the most voted mayor of Bologna since the introduction of the direct elections in 1995. ==Geography==