Lisbon metropolitan area
The Lisbon metropolitan area, centered in the Portuguese capital city of Lisbon, is the largest population concentration in Portugal. The population in 2011 was 2,821,876, of whom 547,733 (19.4%) live in the city of Lisbon. About 26.7% of the total population of Portugal lives in the Lisbon metropolitan area. The area of the Lisbon metropolitan area is 3,015.24 km, which is 3.3% of the total area of Portugal.
Portuguese Empire
In 1808, Napoleon Bonaparte invaded Portugal, and Dom João, Prince Regent in place of his mother, Dona Maria I, ordered the transfer of the royal court to Brazil. In 1815 Brazil was elevated to the status of Kingdom, the Portuguese state officially becoming the United Kingdom of Portugal, Brazil and the Algarves ("Reino Unido de Portugal, Brasil e Algarves"), and the capital was transferred from Lisbon to Rio de Janeiro, the only instance of a European country being ruled from one of its colonies. There was also the election of Brazilian representatives to the Cortes Constitucionais Portuguesas (Portuguese Constitutional Courts), the Parliament that assembled in Lisbon in the wake of the Liberal Revolution of 1820.