Lisbon
Lisbon is one of the oldest cities in the world, and one of the oldest in Western Europe, predating other modern European capitals such as London, Paris, and Rome by centuries. Julius Caesar made it a municipium called "Felicitas Julia", adding to the name "Olissipo". 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.
Lisbon Airport
In January 2019, Portugal's government unveiled a 1.1-billion-euro ($1.26 billion) plan to expand Lisbon's current airport and build a second one. National airports operator ANA is footing the bill to adapt a military airfield in Montijo, by road from Lisbon. It aims to handle around 50 million passengers a year from 2022. The airports company will also pay for the expansion of the Humberto Delgado Airport in the capital. With around 29 million passengers a year, it is at full capacity.