Lisbon
Lisbon (; , ) is the capital and the largest city of Portugal, with an estimated population of 505,526 within its administrative limits in an area of 100.05 km. Its urban area extends beyond the city's administrative limits with a population of around 2.8 million people, being the 11th-most populous urban area in the European Union. About 3 million people live in the Lisbon Metropolitan Area (which represents approximately 27% of the country's population). It is mainland 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. The westernmost areas of its metro area form the westernmost point of Continental Europe, which is known as Cabo da Roca, located in the Sintra Mountains.
António Costa
António Costa resigned all government offices in May 2007 to become his party's candidate for the municipality of Lisbon, Portugal's capital city. He was elected as Lisbon's mayor on 15 July 2007 and reelected in 2009 and 2013, with a bigger majority each time. In April 2015 he resigned his duties as a mayor, while he was already the Secretary General of the Socialist Party and the party's candidate for Prime Minister, so that he could prepare his campaign for the October 2015 general elections.