The Lisbon region contributes with a higher GDP PPP per capita than any other region in Portugal.
Ruled by a series of Germanic tribes from the 5th century, it was captured by the Moors in the 8th century.
In 1147, the Crusaders under Afonso Henriques reconquered the city and since then it has been a major political, economic and cultural centre of Portugal.
Unlike most capital cities, Lisbon's status as the capital of Portugal has never been granted or confirmed officially – by statute or in written form.
Its position as the capital has formed through constitutional convention, making its position as de facto capital a part of the Constitution of Portugal. It has the warmest winters of any metropolis in Europe, with average temperatures 15 °C (59 °F) during the day and 8 °C (46 °F) at night from December to February.
The typical summer season lasts about six months, from May to October, although also in April temperatures sometimes reach around 25 °C (77.0 °F).
The claim that the name of Lisbon can be traced back to Phoenician times is often repeated in non-academic literature, usually referring to the supposed Phoenician term Alis-Ubo, meaning "safe harbour", neither of these folk etymologies has any historical credibility.
Another conjecture based on ancient hydronymy suggests that the name of the settlement derived from the pre-Roman appellation for the Tagus, Lisso or Lucio.
It is continental Europe's westernmost capital city and the only one along the Atlantic coast.
Lisbon lies in the western Iberian Peninsula on the Atlantic Ocean and the River Tagus.