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Additionally artificial lakes were constructed as part of Christian IV's large building project.

It was prohibited to build beyond these original city limits so that the fortification’s cannons could have clear shot and so that the enemy could not find any hiding areas.

From Kastellet at the northeast point of the district runs Øster Voldgade ("Eastern Wall Street") to the southwest.

Vester Voldgade ("Western Wall Street") starts at Ørsteds Park and runs southeast until it reaches the water of Copenhagen Harbour (Københavns Havn).

This area features not only cultural landmarks but also numerous business premises, providing the opportunity to work and enjoy art simultaneously.

Despite being carefully guarded, they still offer modern working spaces, allowing professionals to immerse themselves in a rich historical ambiance while conducting their daily business.

It was only a fishing village until the middle of the 12th century when Havn ("Harbour"), as the town was then called, assumed increasing importance in the Danish kingdom.

Whereas other cities in the Danish realm were under the governance of the king, Havn or Købmannehavn (Merchants' Harbour) as it comes to be known, was given to the Bishop of Roskilde.

Bishop Absalon built his fortified "Castle at Havn" in 1167 on a little island outside the harbour itself, the remains of which can still be seen under present day Christiansborg Palace.

The new king decided to make the town the economic, military, religious, and cultural centre for the whole of the Nordic region.

Apart from the new earthworks, Christian IV commissioned German and Dutch architects and craftsmen to construct magnificent edifices designed to enhance his prestige.

By the time of Christian IV's death in 1648, Copenhagen had become Denmark's principal fortification and naval port, and the town formed a framework for the administration of the Danish kingdom and as a centre of trade in Northern Europe.