Luanda, formerly named São Paulo da Assunção de Loanda, is the capital and largest city in Angola, and the country's most populous and important city, primary port and major industrial, cultural and urban centre. Located on Angola's coast with the Atlantic Ocean, Luanda is both Angola's chief seaport and its administrative centre. It has a metropolitan population of over 6 million. It is also the capital city of Luanda Province, and the world's third most populous Portuguese-speaking city, behind only São Paulo and Rio de Janeiro, both in Brazil, and the most populous Portuguese-speaking capital city in the world, ahead of Brasília, Maputo and Lisbon.