Christianshavn is a neighbourhood in Copenhagen, Denmark. Part of the Indre By District, it is located on the island of Amager and separated from the rest of the city centre by the Inner Harbour. It was founded in the early 17th century by Christian IV as part of his extension of the fortifications of Copenhagen. Originally, it was laid out as an independent privileged merchant's town with inspiration from Dutch cities but it was soon incorporated into Copenhagen proper. Dominated by canals, it is the part of Copenhagen with the most nautical atmosphere.
For much of the 20th century a working-class neighbourhood, Christianshavn developed a bohemian reputation in the 1970s and it is now a fashionable, diverse and lively part of the city with its own distinctive personality, with residents tending to see themselves first as Christianshavners and then as Copenhageners. Businessmen, students, artists, hippies and traditional families with children live side-by-side.
Administratively, Christianshavn has been part of Indre By since 2007, but it still has its own local council.
Christianshavn covers an area of 3.43 km², and includes three minor islands to the north, jointly referred to as Holmen. It has a population of 10,140 and a population density of 2,960 per km².
To the south and east Christianshavn is defined by its old ramparts. To the west Christianshavn borders on the Inner Harbour that separates it from Slotsholmen and the rest of Copenhagen's city centre.
In 1612, Christian IV initiated an ambitious programme to fortify Copenhagen. During the period 1618-1623, he erected earthen embarkments with five bastions in the marshy area between Copenhagen and the island of Amager. At the same time the idea was hatched of creating a new merchant town in the area. In 1639 the little merchant and fortress town of Christianshavn was established. However, competition from Copenhagen soon proved too strong for the little town, and by 1674 it was incorporated into its larger neighbour.
The fortifications were further developed with six more bastions in the 1660s, and seven more bastions between 1682-1692. Additional reinforcements occurred between 1779–1791, and again in 1810-1813. Even though the fortifications around the Inner City were being dismantled in the late 19th century, Christianshavn's fortifications continued in use into the 20th century. Some areas were opened up in the late 1910s-1920s, and the final areas were made public space in 1961.