The origin of the earliest settlement at the site of present-day Barcelona is unclear.
The ruins of an early settlement have been found, including different tombs and dwellings dating to earlier than 5000 BC.
However, this name refers only to FC Barcelona, the football club.
The common abbreviated form used by locals is Barna.
The second legend attributes the foundation of the city directly to the historical Carthaginian general, Hamilcar Barca, father of Hannibal, who supposedly named the city Barcino after his family in the 3rd century BC, In about 15 BC, the Romans redrew the town as a castrum (Roman military camp) centred on the "Mons Taber", a little hill near the contemporary city hall (Plaça de Sant Jaume).
Barcelona is one of the world's leading tourist, economic, trade fair and cultural centres, 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 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.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.