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.
Portugal
Portugal has been a semi-presidential representative democratic republic since the ratification of the Constitution of 1976, with Lisbon, the nation's largest city, as its capital. The Constitution grants the division or separation of powers among four bodies referred as "organs of Sovereignty": the President of the Republic, the Government, the Assembly of the Republic and the Courts.