Kammala wannan jumla: Rukunin ya gano tarihinsa zuwa tsawo na Copenhagen ta Yammacin Rampart bayan da
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.