from Wikipedia Barcelona:
Barcelona (Catalan IPA: [bəɾsəˈlonə], Spanish IPA: [baɾθeˈlona]) is the capital and most populous city of Catalonia and the second largest city in Spain, with a population of 1,605,602 in 2006, while the population of the Metropolitan Area was 3,161,081. It is the central nucleus of the Urban Region of Barcelona, which relies on a population of 4,856,579. It is located on the Mediterranean coast (41°23′N, 2°11′E) between the mouths of the rivers Llobregat and Besòs and is limited to the west by the Serra de Collserola ridge (512 m/1,680 ft).
Barcelona is a major economic centre with one of Europe's principal Mediterranean ports, and Barcelona International Airport is the second largest in Spain. Founded as a Roman city, Barcelona became the capital of the Counts of Barcelona and the Crown of Aragon. Besieged several times during its history, Barcelona is today an important cultural centre and a major tourist destination and has a rich cultural heritage. Particularly renowned are architectural works of Antoni Gaudí and Lluís Domènech i Montaner that have been designated UNESCO World Heritage Sites.
As the capital of Catalonia, Barcelona houses the seat of the Catalan government, known as the Generalitat de Catalunya; of particular note are the executive branch, the parliament, and the Supreme Court of Catalonia. The city is also the capital of the county (comarca) of the Barcelonès.