Porto
The urban area of Porto, which extends beyond the administrative limits of the city, has a population of 2.4 million (2011) in an area of 389 km2(150 sq mi), making it the second-largest urban area in Portugal. It is recognized as a gamma level global city by the Globalization and World Cities (GaWC) Study Group, the only Portuguese city besides Lisbon to be recognised as a global city.