Barcelona

Barcelona is the capital city of the autonomous community of Catalonia in Spain and Spain's second most populated city, with a population of 1.6 million within its administrative limits. Its urban area extends beyond the administrative city limits with a population of around 4.7 million people, being the sixth-most populous urban area in the European Union after Paris, London, Madrid, the Ruhr area, and Milan. It is the largest metropolis on the Mediterranean Sea, located on the coast between the mouths of the rivers Llobregat and Besòs, and bounded to the west by the Serra de Collserola mountain range, the tallest peak of which is 512 metres (1,680 ft) high. 

Founded as a Roman city, in the Middle Ages Barcelona became the capital of the County of Barcelona. After merging with the Kingdom of Aragon, Barcelona continued to be an important city in the Crown of Aragon as an economical and administrative center of this Crown and the capital of the Principality of Catalonia. Besieged several times during its history, Barcelona has a rich cultural heritage and is today an important cultural center and a major tourist destination. Particularly renowned are the architectural works of Antoni Gaudí and Lluís Domènech i Montaner, which have been designated UNESCO World Heritage Sites. The headquarters of the Union for the Mediterranean is located in Barcelona. The city is known for hosting the 1992 Summer Olympics as well as world-class conferences and expositions and also many international sport tournaments.

Barcelona is one of the world's leading tourist, economic, trade fair and cultural centers, and its influence in commerce, education, entertainment, media, fashion, science, and the arts all contribute to its status as one of the world's major global cities. It is a major cultural and economic center in southwestern Europe, 24th in the world (before Zürich, after Frankfurt) and a financial center. In 2008 it was the fourth most economically powerful city by GDP in the European Union and 35th in the world with GDP amounting to €177 billion. In 2012 Barcelona had a GDP of $170 billion; it is leading Spain in both employment rate and GDP per capita change. In 2009 the city was ranked Europe's third and one of the world's most successful as a city brand. In the same year the city was ranked Europe's fourth best city for business and fastest improving European city, with growth improved by 17% per year, but it has since been in a full recession with declines in both employment and GDP per capita, with some recent signs of the beginning of an economic recovery. Since 2011 Barcelona is a leading smart city in Europe. Barcelona is a transport hub with the Port of Barcelona being one of Europe's principal seaports and busiest European passenger port, an international airport, Barcelona–El Prat Airport, which handles above 35 million passengers per year, an extensive motorway network and a high-speed rail line with a link to France and the rest of Europe. 

The name Barcelona comes from the ancient Iberian Barkeno, attested in an ancient coin inscription found on the right side of the coin in Iberian script as Barkeno in Levantine Iberian script, in Ancient Greek sources as Βαρκινών, Barkinṓn; and in Latin as Barcino, Barcilonum and Barcenona. 

Sources suggest that the city may have been named after the Carthaginian general Hamilcar Barca, who was supposed to have founded the city in the 3rd century BC. 

During the Middle Ages, the city was variously known as Barchinona, Barçalona, Barchelonaa, and Barchenona. 

Internationally, Barcelona's name is usually abbreviated as 'Barsa' or 'Barça'. Locally, this name refers only to FC Barcelona, the football club. Locals refer to the city instead as 'Barna'. 

Another common abbreviation is 'BCN', which is also the IATA airport code of the Barcelona-El Prat Airport. 

The city is also referred to as the Ciutat Comtal in Catalan, and Ciudad Condal in Spanish, owing to its past as the seat of the Count of Barcelona. 

The origin of the earliest settlement at the site of present-day Barcelona is unclear. Around the actual neighborhood of Raval have been found remains of an early settlement, including different tombs and a hut from 5.500 BC. The founding of Barcelona is the subject of two different legends. The first attributes the founding of the city to the mythological Hercules. The second legend attributes the foundation of the city directly to the historical Carthaginian Hamilcar Barca, father of Hannibal, who named the city Barcino after his family in the Third century BC. 

In about 15 BC, the Romans redrew the town as a castrum (Roman military camp) centerd on the "Mons Taber", a little hill near the contemporary city hall (Plaça de Sant Jaume). Under the Romans, it was a colony with the surname of Faventia, or, in full, Colonia Faventia Julia Augusta Pia Barcino or Colonia Julia Augusta Faventia Paterna Barcino. Pomponius Mela mentions it among the small towns of the district, probably as it was eclipsed by its neighbour Tarraco (modern Tarragona), but it may be gathered from later writers that it gradually grew in wealth and consequence, favoured as it was with a beautiful situation and an excellent harbour. It enjoyed immunity from imperial burdens. The city minted its own coins; some from the era of Galba survive. 

Important Roman vestiges are displayed in Plaça del Rei underground, as a part of the Barcelona City History Museum MUHBA; the typically Roman grid plan is still visible today in the layout of the historical center, the Barri Gòtic (Gothic Quarter). Some remaining fragments of the Roman walls have been incorporated into the cathedral. The cathedral, also known as the Basilica La Seu, is said to have been founded in 343. The city was conquered by the Visigoths in the early 5th century, becoming for a few years the capital of all Hispania. After being conquered by the Arabs in the early 8th century, it was conquered in 801 by Charlemagne's son Louis, who made Barcelona the seat of the Carolingian "Hispanic March" (Marca Hispanica), a buffer zone ruled by the Count of Barcelona.

The Counts of Barcelona became increasingly independent and expanded their territory to include all of Catalonia, although on 6 July 985, Barcelona was sacked by the army of Almanzor. The sack was so traumatic that most of Barcelona's population was either killed or enslaved. In 1137, Aragon and the County of Barcelona merged in dynastic union by the marriage of Ramon Berenguer IV and Petronilla of Aragon, their titles finally borne by only one person when their son Alfonso II of Aragon ascended to the throne in 1162. His territories were later to be known as the Crown of Aragon, which conquered many overseas possessions and ruled the western Mediterranean Sea with outlying territories in Naples and Sicily and as far as Athens in the 13th century. The forging of a dynastic link between the Crowns of Aragon and Castile marked the beginning of Barcelona's decline. The Bank of Barcelona, probably the oldest public bank in Europe, was established by the city magistrates in 1401. It originated from necessities of the state, as did the Bank of Venice (1402) and the Bank of Genoa (1407). 

The marriage of Ferdinand II of Aragon and Isabella I of Castile in 1469 united the two royal lines. Madrid became the center of political power whilst the colonisation of the Americas reduced the financial importance (at least in relative terms) of Mediterranean trade. Barcelona was a center of Catalan separatism, including the Catalan Revolt (1640–52) against Philip IV of Spain. The great plague of 1650–1654 halved the city's population. 

In the 18th century, a fortress was built at Montjuïc that overlooked the harbour. In 1794, this fortress was used by the French astronomer Pierre François André Méchain for observations relating to a survey stretching to Dunkirk that provided the official basis of the measurement of a metre. The definitive metre bar, manufactured from platinum, was presented to the French legislative assembly on 22 June 1799. Much of Barcelona was negatively affected by the Napoleonic wars, but the start of industrialization saw the fortunes of the province improve. 

During the Spanish Civil War, the city, and Catalonia in general, were resolutely Republican. Many enterprises and public services were "collectivised" by the CNT and UGT unions. As the power of the Republican government and the Generalitat diminished, much of the city was under the effective control of anarchist groups. The anarchists lost control of the city to their own allies, the Communists and official government troops, after the street fighting of the Barcelona May Days. The fall of the city on 26 January 1939, caused a mass exodus of civilians who fled to the French border. The resistance of Barcelona to Franco's coup d'état was to have lasting effects after the defeat of the Republican government. The autonomous institutions of Catalonia were abolished, and the use of the Catalan language in public life was suppressed. Barcelona remained the second largest city in Spain, at the heart of a region which was relatively industrialised and prosperous, despite the devastation of the civil war. The result was a large-scale immigration from poorer regions of Spain (particularly Andalusia, Murcia and Galicia), which in turn led to rapid urbanisation. The city gained vitality in 1992 when it hosted the Olympic games.