Lisbon is a capital city.
Lisbon ( [ ˈlɪzbən ] Lisboa , [ liʒˈβoɐ ] ) is the capital and the largest city of Portugal , with a population of 552,700 within its administrative limits in an area of 100.05 km ² . It is continental Europe 's westernmost capital city and the only one along the Atlantic coast . 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 . 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 .