Prehistory and Roman times
The city's area has been inhabited since the fifth or fourth millennium BC, making it one of the oldest continuously inhabited cities in the world. In the fifth century BC the first town, or oppidum, was founded probably by the ancient Ligures (which gave the name to the modern region of Liguria) at the top of the hill today called Castello (Castle), which is now inside the medieval old town. In this period the Genoese town, inhabited by the "Genuati" (a group of Ligure peoples), was considered "the emporium of the Ligurians", given its strong commercial character.
The "Genoese oppidum" had an alliance with Rome through a foedus aequum (equal pact) in the course of the Second Punic War. The Carthaginians accordingly destroyed it in 209 BC. The town was rebuilt and, after the Carthaginian Wars ended in 146 BC, it received municipal rights. The original castrum then expanded towards the current areas of Santa Maria di Castello and the San Lorenzo promontory. Trade goods included skins, timber, and honey. Goods were moved to and from Genoa's hinterland, including major cities like Tortona and Piacenza. An amphitheater was also found there among other archaeological remains from the Roman period.
Middle Ages to early modern period
5th to 10th centuries
After the fall of the Western Roman Empire, the Ostrogoths occupied Genoa. After the Gothic War, the Byzantines made it the seat of their vicar. When the Lombards invaded Italy in 568, Bishop Honoratus of Milan fled and held his seat in Genoa. During this time and in the following century Genoa was little more than a small centre, slowly building its merchant fleet, which was to become the leading commercial carrier of the Western Mediterranean. In 934–35 the town was thoroughly sacked and burned by a Fatimid fleet under Ya'qub ibn Ishaq al-Tamimi.
Rise of the Genoese Republic
Genoa started expanding during the First Crusade. At the time the city had a population of about 10,000. Twelve galleys, one ship and 1,200 soldiers from Genoa joined the crusade. The Genoese troops, led by noblemen de Insula and Avvocato, set sail in July 1097. The Genoese fleet transported and provided naval support to the crusaders, mainly during the siege of Antioch in 1098, when the Genoese fleet blockaded the city while the troops provided support during the siege. In the siege of Jerusalem in 1099 Genoese crossbowmen led by Guglielmo Embriaco acted as support units against the defenders of the city.
The Republic's role as a maritime power in the Mediterranean region secured many favorable commercial treaties for Genoese merchants. They came to control a large portion of the trade of the Byzantine Empire, Tripoli (Libya), the Principality of Antioch, Cilician Armenia, and Egypt. Although Genoa maintained free-trading rights in Egypt and Syria, it lost some of its territorial possessions after Saladin's campaigns in those areas in the late 12th century.
13th and 14th centuries
The commercial and cultural rivalry of Genoa and Venice was played out through the thirteenth century. Thanks to the major role played by the Republic of Venice in the Fourth Crusade, Venetian trading rights were enforced in the eastern Mediterranean and Venice was able to gain control of a large portion of maritime commerce in the region.
To regain control of local commerce, the Republic of Genoa allied with Michael VIII Palaiologos, emperor of Nicaea, who wanted to restore the Byzantine Empire by recapturing Constantinople. In March 1261 the treaty of the alliance was signed in Nymphaeum. On 25 July 1261, Nicaean troops under Alexios Strategopoulos recaptured Constantinople. As a result, the balance of favour tipped toward Genoa, which was granted free trade rights in the Nicene Empire. The islands of Chios and Lesbos became commercial stations of Genoa as well as the city of Smyrna (Izmir). In the same century the Republic conquered many settlements in Crimea, known as Gazaria, where the Genoese colony of Caffa was established. The alliance with the restored Byzantine Empire increased the wealth and power of Genoa, and simultaneously decreased Venetian and Pisan commerce. The Byzantine Empire had granted the majority of free trading rights to Genoa.
Around the 14th century, Genoa was also credited with the invention of blue jeans. Genoa's jean fabric was a fustian textile of "medium quality and of reasonable cost", very similar to cotton corduroy for which Genoa was famous, and was "used for work clothes in general". The Genoese navy equipped its sailors with jeans, as they needed a fabric which could be worn wet or dry.
As a result of the Genoese support to the Aragonese rule in Sicily, Genoa was granted free trading and export rights in the Kingdom. Genoese bankers also profited from loans to the new nobility of Sicily. While Corsica was formally annexed in 1347.
15th and 16th centuries
In the 15th century two of the earliest banks in the world w1483ere founded in Genoa: the Bank of Saint George, founded in 1407, which was the oldest state deposit bank in the world at its closure in 1805 and the Banca Carige, founded in 1483 as a mount of piety, which still exists. Christopher Columbus was born in Genoa c. 1451, and donated one-tenth of his income from the discovery of the Americas for Spain to the Bank of Saint George in Genoa for the relief of taxation on foods. Under the ensuing economic recovery, many aristocratic Genoese families, such as the Balbi, Doria, Grimaldi, Pallavicini, and Serra, amassed tremendous fortunes. According to Felipe Fernandez-Armesto and others, the practices Genoa developed in the Mediterranean (such as chattel slavery) were crucial in the exploration and exploitation of the New World.
Territories of the Republic of Genoa, around the Mediterranean & Black Sea coasts.
Thereafter, Genoa underwent something of an associate of the Spanish Empire, with Genoese bankers, in particular, financing many of the Spanish crown's foreign endeavors from their counting houses in Seville. Fernand Braudel has even called the period 1557 to 1627 the "age of the Genoese", "of a rule that was so discreet and sophisticated that historians for a long time failed to notice it" (Braudel 1984 p. 157). The Genoese bankers provided the unwieldy Habsburg system with fluid credit and a dependably regular income. In return the less dependable shipments of American silver were rapidly transferred from Seville to Genoa, to provide capital for further ventures. Genoa's trade, however, remained closely dependent on control of Mediterranean sealanes, and the loss of Chios to the Ottoman Empire (1566), struck a severe blow.
17th and 18th centuries
From the 17th century, the Genoese Republic started a period of slow decline, In May 1625 a French-Savoian army briefly laid siege to Genoa. Though it was eventually lifted with the aid of the Spanish, the French would later bombard the city in May 1684 for its support of Spain during the War of the Reunions. In-between, a plague killed as many as half of the inhabitants of Genoa in 1656–57. Genoa continued its slow decline well into the 18th century, losing its last Mediterranean colony, the island fortress of Tabarka, to the Bey of Tunis in 1742.
The Convention of Turin of 1742, in which Austria allied with the Kingdom of Sardinia, caused some consternation in the Republic. Consequently, the Republic of Genoa signed a secret treaty with the Bourbon allies of Kingdom of France, Spanish Empire and Kingdom of Naples. On 26 June 1745, the Republic of Genoa declared war on the Kingdom of Sardinia. This decision would prove disastrous for Genoa, which later surrendered to the Austrians in September 1746 and was briefly occupied before a revolt liberated the city two months later.
In 1780, the Confetteria Romanengo was founded.
In a much weaker state, Genoa was forced to cede Corsica to the French in the 1768 Treaty of Versailles.
The direct intervention of Napoleon (during the Campaigns of 1796) and his representatives in Genoa was the final act that led to the fall of the Republic in early June, who overthrew the old elites which had ruled the state for all of its history, giving birth to the Ligurian Republic on 14 June 1797, under the watchful care of Napoleonic France. After Bonaparte's seizure of power in France, a more conservative constitution was enacted, but the Ligurian Republic's life was short—in 1805 it was annexed by France, becoming the départements of Apennins, Gênes, and Montenotte.
Following the fall of Napoleon, Genoa regained ephemeral independence, with the name of the Repubblica genovese, which lasted less than a year. However, the Congress of Vienna established the annexation of the whole territories of the former Genoese Republic to the Kingdom of Sardinia, governed by the House of Savoy, contravening the principle of restoring the legitimate governments and monarchies of the old Republic.
19th century
In the 19th century, Genoa consolidated its role as a major seaport and an important steel and shipbuilding centre. In Genoa in 1853, Giovanni Ansaldo founded Gio. Ansaldo & C. whose shipyards would build some of the most beautiful ships in the world, such as ARA Garibaldi, SS Roma, MS Augustus, SS Rex, SS Andrea Doria, SS Cristoforo Colombo, MS Gripsholm, SS Leonardo da Vinci, SS Michelangelo, and SS SeaBreeze. In 1854, the ferry company Costa Crociere was founded. In 1861 the Registro Italiano Navale Italian register of shipping was created, and in 1879 the Yacht Club Italiano. The owner Raffaele Rubattino in 1881 was among the founders of the ferry company Navigazione Generale Italiana which then become the Italian Line. In 1870 Banca di Genova was founded which in 1895 changed its name to Credito Italiano and in 1998 became Unicredit. In 1874 the city was completely connected by railway lines to France and the rest of Italy: Genoa-Turin, Genoa-Ventimiglia, Genoa-Pisa. In 1884 Rinaldo Piaggio founded Piaggio & C. that produced locomotives and railway carriages and then in 1923 began aircraft production. In 1888 the Banca Passadore was established. In 1898 the insurance company called Alleanza Assicurazioni was founded.
20th century
In 1917 Lloyd Italico insurance company was founded. In 1956 Genoa took part in the Regatta of the Historical Marine Republics. In 1962 Genoa International Boat Show was established. In 1966 Euroflora was established. In 1970 Genoa was hit by a serious flood, which caused the Bisagno stream to overflow. In 1987 the Banco di San Giorgio was established. In 1992 Genoa celebrated the Colombiadi or Genoa Expo '92, the celebration of the 500th anniversary of the discovery of the American Continent by Christopher Columbus. The area of the ancient port of Genoa is restructured and expanded also with the works of the architect Renzo Piano.
21st century
The 27th G8 summit, that took place in July 2001, was hosted in the city of Genoa; however, it was overshadowed by violent protests (Anti-globalisation movement), with one protester killed. In 2003, the Istituto Italiano di Tecnologia (IIT) was established. In 2004, the European Union designated Genoa as the European Capital of Culture for that year, along with the French city of Lille.
On 14 August 2018 the Ponte Morandi viaduct bridge for motor vehicles collapsed during a torrential downpour, leading to 43 deaths. The remains of the Ponte Morandi viaduct bridge were demolished in August 2019. The replacement bridge, the Genoa-Saint George Bridge was inaugurated in August 2020 during COVID-19 pandemic.
In 2023 Genoa becomes the finish of The Ocean Race.