Barcelona is the capitol city of Catalonia.
Barcelona ( [ bɑrsəˈloʊnə ] , [ bəɾsəˈlonə ] , [ barθeˈlona ] ) is the capital city of the autonomous community of Catalonia in the Kingdom of Spain , as well as the country 's second most populous municipality , with a population of 1.6 million within city limits . After merging with the Kingdom of Aragon , Barcelona continued to be an important city in the Crown of Aragon as an economic and administrative centre of this Crown and the capital of the Principality of Catalonia .