Originally a Viking fishing village founded in the 10th century, Copenhagen became the capital of Denmark in the beginning of the 15th century. During the 17th century, under the reign of Christian IV, it became a significant regional centre. Since the turn of the millennium, Copenhagen has seen a strong urban and cultural development, partly due to massive investments in cultural facilities and infrastructure. Since the completion of the transnational Øresund Bridge, Copenhagen has become increasingly integrated with the Swedish city of Malmö, growing into a combined metropolitan area, known as the Øresund Region.
Copenhagen is the cultural, economic and governmental centre of Denmark and is among the financial centres of Northern Europe with the Copenhagen Stock Exchange. Copenhagen has 89,000 students enrolled in its educational institutions.
A diverse infrastructure allows for a blend of bicycles, cars and public transport while the Copenhagen Metro serves central Copenhagen, the S-train connects the outlying boroughs. The Copenhagen Airport is largest airport in the Nordic countries, serving 23.3 million passengers in 2012 The city hosts a lot of construction sites due to improvements in infrastructure and the expansion of the Metro.