Barcelona, is a city in northeastern Spain, capital of Barcelona Province and the autonomous region of Catalonia, a seaport on the Mediterranean Sea between the Llobregat and Besós rivers.
Founded as a Roman city, Barcelona became the capital of the County of Barcelona. After merging with the Kingdom of Aragon, Barcelona continued to be an important city to the Crown of Aragon. When Kingdoms of Aragon and Castile united to form the Kingdom of Spain, Barcelona became it's most important port city. Besieged several times during its history, Barcelona has a rich cultural heritage and is today an important cultural centre and a major tourist destination.