Genoa is the capital of Liguria and the sixth largest city in Italy with a population of 594,904 within its administrative limits on a land area of 243.6 km2 (94 sq mi). The urban zone of Genoa extends beyond the administrative city limits with a population of 718,896. The urban area of Genoa has a population of 800,709. Over 1.5 million people live in the metropolitan area. Genoa is one of Europe's largest cities on the Mediterranean Sea and the largest seaport in Italy. Genoa has been nicknamed la Superba ("the Proud one") due to its glorious past and impressive landmarks. Part of the old town of Genoa was inscribed on the World Heritage List (UNESCO) in 2006 (see below). The city's rich art, music, gastronomy, architecture and history allowed it to become the 2004 European Capital of Culture. It is the birthplace of Christopher Columbus and Niccolo Paganini. Genoa, which forms the southern corner of the Milan-Turin-Genoa industrial triangle of north-west Italy, is one of the country’s major economic centres. The city has hosted massive shipyards and steelworks since the 19th century, and its solid financial sector dates back to the Middle Ages. The Bank of Saint George, founded in 1407, is among the oldest in the world and has played an important role in the city’s prosperity since the middle of the 15th century. Today a number of leading Italian companies are based in the city, including Selex ES, Ansaldo Energia, Ansaldo STS, Edoardo Raffinerie Garrone and Piaggio Aero. The city of Genoa covers an area of 243 square kilometres (94 sq mi) between the Ligurian Sea and the Apennine Mountains. The city stretches along the coast for about 30 kilometres (19 mi) from the neighbourhood of Voltri to Nervi, and for 10 kilometres (6.2 mi) from the coast to the north along the valleys Polcevera and Bisagno. The territory of Genoa can then be popularly divided into 5 main zones: the centre, the west, the east, the Polcevera and the Bisagno Valley. Genoa is adjacent to two popular Ligurian vacation spots, Camogli and Portofino. In the metropolitan area of Genoa lies Aveto Natural Regional Park. Genoa has a borderline humid subtropical (Cfa) and Mediterranean climate (Csa), since only one summer month has less than 40 millimetres (1.6 in) of rainfall, preventing it from being classified as solely humid subtropical or Mediterranean. The average yearly temperature is around 19 °C (66 °F) during the day and 13 °C (55 °F) at night. In the coldest months: December, January and February, the average temperature is 12 °C (54 °F) during the day and 6 °C (43 °F) at night. In the warmest months – July and August – the average temperature is 27.5 °C (82 °F) during the day and 21 °C (70 °F) at night. The daily temperature range is limited, with an average range of about 6 °C (11 °F) between high and low temperatures. Annually, the average 2.9 of nights recorded temperatures of ≤0 °C (32 °F) (mainly in January). The coldest temperature ever recorded was −8 °C (18 °F) on the night of February 2012; the highest temperature ever recorded during the day is 37.4 °C (99 °F) on the July 2011. Average annual number of days with temperatures of ≥30 °C (86 °F) is about 8, average four days in July and August. Average annual temperature of the sea is 17.5 °C (64 °F), from 13 °C (55 °F) in the period January–March to 25 °C (77 °F) in August. In the period from June to October, the average sea temperature exceeds 19 °C (66 °F). Genoa is also a windy city, especially during winter when northern winds often bring cool air from the Po Valley (usually accompanied by lower temperatures, high pressure and clear skies). Another typical wind blows from southeast, mostly as a consequence of atlantic disturbances and storms, bringing humid and warmer air from the sea. Snowfall is sporadic, but does occur almost every year, albeit big amounts in the city centre are rare. Annual average relative humidity is 68%, ranging from 63% in February to 73% in May. Sunshine hours total above 2,200 per year, from an average 4 hours of sunshine duration per day in winter to average 9 hours in summer. This value is an average between the northern half of Europe and North Africa. The first organized forms of higher education in Genoa date back to the 13th century when private colleges were entitled to award degrees in Medicine, Philosophy, Theology, Law, Arts. Today the University of Genoa, founded in the 15th century, is one of the largest in Italy, with 11 faculties, 51 departments and 14 libraries. In 2007–2008, the University had 41,000 students and 6,540 graduates. Several cruise and ferry lines serve the passenger terminals in the old port, with a traffic of 3.2 million passengers in 2007. MSC Cruises chose Genoa as one of its main home ports, in competition with the Genoese company Costa Cruises, which moved its home port to Savona.