Rubuta ci gaba don wannan sakin layi - Rukunin ya gano tarihinsa zuwa ga fadada Copenhagen ta West Rampart bayan Assault a Copenhagen
a 1659 wanda ya faru a can. Don a kāre Slotsholmen, a lokacin da fadar sarki da rundunar jiragen ruwa suke zama, an faɗaɗa West Rampart zuwa cikin teku. An cika yankin da ba shi da zurfin ruwa tsakanin katangar da aka faɗaɗa da Slotsholmen don samar da gundumar da aka ba sunan Frederiksholm. An haƙa Frederiksholms Kanal a cikin 1681.