Bergen, historically Bjørgvin, is a city and municipality in Vestland on the west coast of Norway., the municipality's population was 283,929, and the Bergen metropolitan region has about 420,000 inhabitants. Bergen is the second-largest city in Norway. The municipality covers 465 km2 and is on the peninsula of Bergenshalvøyen. The city centre and northern neighbourhoods are on Byfjorden, 'the city fjord', and the city is surrounded by mountains; Bergen is known as the 'city of seven mountains'. Many of the extra-municipal suburbs are on islands. Bergen is the administrative centre of Hordaland, and consists of eight boroughs: Arna, Bergenhus, Fana, Fyllingsdalen, Laksevåg, Ytrebygda, Årstad, and Åsane.