Lisbon ( LIZ-bən; Portuguese: Lisboa [liʒˈβoɐ] ⓘ) is the capital and most populous city of Portugal, with an estimated population of 658,236 as of 2025, within its administrative limits and 3,353,000 within the metropolis, as of 2025. The city lies in the western part of the Iberian Peninsula, fronting the northern shore of the River Tagus.
Lisbon is one of the oldest cities in the world and the second-oldest European capital city (after Athens), predating other modern European capitals by centuries. Settled by pre-Celtic tribes and later founded and civilised by the Phoenicians, Julius Caesar made it a municipium called Felicitas Julia, adding the term to the name Olisipo. After the fall of the Roman Empire, it was ruled by a series of Germanic tribes from the 5th century, most notably the Visigoths. Later it was captured by the Moors in the 8th century. In 1147, Afonso Henriques conquered the city and in 1255, it became Portugal's capital, replacing Coimbra. It has since been the political, economic, and cultural centre of the country.
As the political centre of the country, Lisbon hosts the government, Assembly of the Republic, Supreme Court of Justice, Armed Forces and residence of the head of state. It is also the centre of Portuguese diplomacy, with ambassadors from 86 countries residing in the city, as well as representations from Taiwan and Palestine. About 3.35 million people live in the Lisbon metropolitan area, which extends beyond the city's administrative area, making it the third largest metropolitan area in the Iberian Peninsula (after Madrid and Barcelona) as well as figuring amongst the 10 most populous urban areas in the European Union. It represents approximately 28% of the country's population.
Lisbon is recognised as an alpha− level global city because of its importance in finance, commerce, fashion, media, entertainment, arts, international trade, education, and tourism. Lisbon is amongst the two Portuguese cities (the other being Porto) to be recognised as a global city, and it is also home to three companies in the Global 2000 (EDP Group, Galp Energia and Jerónimo Martins). Lisbon is one of the major economic centres in Europe, with a growing financial sector, with PSI-20 being part of Euronext, the largest centre for debt and funds listings in the world. The Lisbon region has a higher GDP PPP per capita than any other region in Portugal, US$179 billion or $61,713 per capita. The city is the 40th richest city in the world by gross earnings. Most of the headquarters of multinational corporations in Portugal are located in the Lisbon area.
Etymology
The precise origin of the name is unknown. Lisbon's name may derive from Proto-Celtic or Celtic Olisippo, Lissoppo, or a similar name which other visiting ancient peoples such as the Phoenicians, Greeks, and Romans adapted accordingly, such as the pre-Roman appellation for the Tagus River, Lisso or Lucio. Classical authors writing in Latin and Greek, including Strabo, Solinus, and Martianus Capella, referred to popular legends that the city of Lisbon was founded by the mythical hero Ulysses (Odysseus). Lisbon's name was written Ulyssippo in Latin by the geographer Pomponius Mela, a native of Hispania. It was later referred to as "Olisippo" by Pliny the Elder and by the Greeks as Olissipo (Ὀλισσιπών) or Olissipona (Ὀλισσιπόνα).
Another claim repeated in historical literature is that the name of Lisbon could originate from a supposed ancient Phoenician term Alis-Ubbo, meaning "safe harbour" or "pleasant haven". Although modern archaeological excavations show there may have been Phoenician presence at this location since 1000 BC, this folk etymology completely lacks any evidence and "is never attested in ancient classical literature".
Lisbon's name is commonly abbreviated as "LX" or "Lx", originating in an antiquated spelling of Lisbon as Lixbõa. While the old spelling has since been completely dropped from usage and goes against modern language standards, the abbreviation is still commonly used.
History
Origins
During the Neolithic period, the region was inhabited by Pre-Celtic tribes, who built religious and funerary monuments, megaliths, dolmens and menhirs, which still survive in areas on the periphery of Lisbon. The Indo-European Celts invaded in the 1st millennium BC, mixing with the Pre-Indo-European population, thus giving rise to Celtic-speaking local tribes such as the Cempsi or Sefes.
Although the first fortifications on Lisbon's Castelo hill are known to be no older than the 2nd century BC, recent archaeological finds have shown that Iron Age people occupied the site from the 8th to 6th centuries BC. This indigenous settlement maintained commercial relations with the Phoenicians, which would account for the recent findings of Phoenician pottery and other material objects. Archaeological excavations made near the Castle of São Jorge (Castelo de São Jorge) and Lisbon Cathedral indicate there may have been a Phoenician presence at this location since 1000 BC, and it can be stated with confidence that a Phoenician trading post stood on a site now the centre of the present city, on the southern slope of the Castle hill. The sheltered harbour in the Tagus River estuary was an ideal spot for an Iberian settlement and would have provided a secure harbour for unloading and provisioning trading ships. The Tagus settlement was an important centre of commercial trade with the inland tribes, providing an outlet for the valuable metals, salt and salted-fish they collected, and for the sale of the Lusitanian horses renowned in antiquity.
According to a persistent legend, the location was named for the Greek mythical king of Ithaca, Ulysses, who founded the city when he sailed westward to the ends of the known world.
Roman era
Following the defeat of Hannibal in 202 BC during the Punic wars, the Romans determined to deprive Carthage of its most valuable possession: Hispania (the Iberian Peninsula). The defeat of Carthaginian forces by Scipio Africanus in Eastern Hispania allowed the pacification of the west, led by Consul Decimus Junius Brutus Callaicus. Decimus obtained the alliance of Olisipo (which sent men to fight alongside the Roman Legions against the northwestern Celtic tribes) by integrating it into the empire, as the Municipium Cives Romanorum Felicitas Julia. Local authorities were granted self-rule over a territory that extended 50 km (31 mi); exempt from taxes, its citizens were given the privileges of Roman citizenship, and it was then integrated with the Roman province of Lusitania (whose capital was Emerita Augusta).
Lusitanian raids and rebellions during Roman occupation required the construction of a wall around the settlement. During Augustus' reign, the Romans also built a great theatre; the Cassian Baths (underneath Rua da Prata); temples to Jupiter, Diana, Cybele, Tethys and Idea Phrygiae (an uncommon cult from Asia Minor), in addition to temples to the Emperor; a large necropolis under Praça da Figueira; a large forum and other buildings such as insulae (multi-storied apartment buildings) in the area between Castle Hill and the historic city core. Many of these ruins were first unearthed during the mid-18th century (when the recent discovery of Pompeii made Roman archaeology fashionable among Europe's upper classes).
The city prospered as piracy was eliminated and technological advances were introduced, consequently Felicitas Julia became a centre of trade with the Roman provinces of Britannia (particularly Cornwall) and the Rhine. Economically strong, Olisipo was known for its garum (a fish sauce highly prized by the elites of the empire and exported in amphorae to Rome), wine, salt, and horse-breeding, while Roman culture permeated the hinterland. The city was connected by a broad road to Western Hispania's two other large cities, Bracara Augusta in the province of Tarraconensis (Portuguese Braga), and Emerita Augusta, the capital of Lusitania. The city was ruled by an oligarchical council dominated by two families, the Julii and the Cassiae, although regional authority was administered by the Roman Governor of Emerita or directly by Emperor Tiberius. Among the majority of Latin speakers lived a large minority of Greek traders and slaves.
Olisipo, like most great cities in the Western Empire, was a centre for the dissemination of Christianity. Its first attested Bishop was Potamius (c. 356), and there were several martyrs during the period of persecution of the Christians: Verissimus, Maxima, and Julia are the most significant examples. By the time of the Fall of Rome, Olisipo had become a notable Christian centre.
Middle Ages
Following the disintegration of the Western Roman Empire, there were barbarian invasions; between 409 and 429 the city was occupied successively by Sarmatians, Alans and Vandals. The Germanic Suebi, who established a kingdom in Gallaecia (modern Galicia and northern Portugal), with its capital in Bracara Augusta, also controlled the region of Lisbon until 585. In 585, the Suebi Kingdom was integrated into the Germanic Visigothic Kingdom of Toledo, which comprised all of the Iberian Peninsula: Lisbon was then called Ulishbona.
On 6 August 711, Lisbon was taken by the Muslim forces of the Umayyad Caliphate. These conquerors built many mosques and houses, rebuilt the city wall (known as the Cerca Moura) and established administrative control, while permitting the diverse population of Muwallads, Arabs, Berbers, Mozarabs, Saqaliba, and Jews to maintain their socio-cultural lifestyles. Mozarabic was the native language spoken by most of the Christian population although Arabic was widely known as spoken by all religious communities. Islam was the official religion practised by the Arabs, Berbers, Saqaliba and Muwallad.
The ancient Muslim influence is still visible in the Alfama district, an old quarter of Lisbon that survived the 1755 Lisbon earthquake: many place-names are derived from Arabic and the Alfama (the oldest existing district of Lisbon) was derived from the Arabic "al-hamma".
For a brief time, Lisbon was an independent Muslim kingdom known as the Taifa of Lisbon (1022–1034), before being conquered by the larger Taifa of Badajoz.
In 1108 Lisbon was raided and occupied by Norwegian crusaders led by Sigurd I on their way to the Holy Land as part of the Norwegian Crusade and occupied by crusader forces for three years. It was taken by the Moorish Almoravids in 1111.
In 1147, as part of Portuguese theatre of the Reconquista, Afonso I of Portugal laid siege and conquered Lisbon with the aid of crusader knights. The city, with about 154,000 residents at the time, was returned to Christian rule. The conquest of Portugal and re-establishment of Christianity is one of the most significant events in Lisbon's history, described in the chronicle Expugnatione Lyxbonensi, which describes, among other incidents, how the local bishop was killed by the crusaders and the city's residents prayed to the Virgin Mary as it happened. Some of the Muslim residents converted to Roman Catholicism and most of those who did not convert fled to other parts of the Islamic world, primarily Muslim Spain and North Africa. All mosques were either destroyed or altered and converted into churches. As a result of the end of Muslim rule in the mid-12th century, spoken Arabic quickly lost its place in Lisbon, and disappeared altogether.
With its central location, Lisbon became the capital city of the new Portuguese territory in 1255.
The first Portuguese university was founded in Lisbon in 1290 by King Denis I; for many years the Studium Generale (General Study) was transferred intermittently to Coimbra, where it was installed permanently in the 16th century as the University of Coimbra.
In 1384, the city was besieged by King Juan I of Castille, as a part of the ongoing 1383–1385 Crisis. The result of the siege was a victory for the Portuguese led by Nuno Álvares Pereira.
During the last centuries of the Middle Ages, Lisbon expanded substantially and became an important trading post with both Northern European and Mediterranean cities.
Early Modern
When the Spaniards expelled the Jews from Spanish territory, many of them fled to Lisbon. Although acknowledging the central importance of the Jews to the city's prosperity, Manuel I decreed in 1497 that all Jews must convert to Christianity, only those who refused being forced to leave, but not before the expropriation of their property. In 1506, a four-day anti-Semitic riot by Old Christians in Lisbon led to the deaths of about 1,000 to 4,000 "New Christians", the descendants of Sephardic Jews whom were primarily forced to convert. The king was at Évora when these events occurred, but angered when he received the news, he ordered an investigation which resulted in two of the instigating friars being excommunicated and burned alive.
Most of the Portuguese expeditions of the Age of Discovery set out from Lisbon during the period from the end of the 15th century to the beginning of the 17th century, including Vasco da Gama's expedition to India in 1498. The following years of the 16th century began Lisbon's golden era: the city was the European hub of commerce between Africa, India, the Far East and later, Brazil, and acquired great riches by exploiting the trade in spices, slaves, sugar, textiles and other goods. This period saw the rise of the exuberant Manueline style in architecture, which left its mark in many 16th-century monuments (including Lisbon's Belém Tower and Jerónimos Monastery, which were declared UNESCO World Heritage Sites). A description of Lisbon in the 16th century was written by Damião de Góis and published in 1554.
The succession crisis of 1580 initiated a sixty-year period of dual monarchy in Portugal and Spain under the Spanish Habsburgs. This is referred to as the "Philippine Dominion" (Domínio Filipino), since all three Spanish kings during that period were called Philip (Filipe). In 1589, Lisbon was the target of an incursion by the English Armada led by Francis Drake, while Queen Elizabeth supported a Portuguese pretender in Antonio, Prior of Crato, but support for Crato was lacking and the expedition was a failure. The Portuguese Restoration War, which began with a coup d'état organised by the nobility and bourgeoisie in Lisbon and executed on 1 December 1640, restored Portuguese independence. The period from 1640 to 1668 was marked by periodic skirmishes between Portugal and Spain, as well as short episodes of more serious warfare until the Treaty of Lisbon was signed in 1668.