Christianspris or Frederiksort was a Danish fortification somewhat north of the then Danish city of Kiel. In 1632 the Danish king Christian IV initiated the works of making a fortification on a land tongue on the West shore of the Kielerfiord on the Jernved peninsula. The purpose was to secure this land against German troops during the 30-years War. However, the town was short lived. Christian IV founded many towns and cities. It is thought this town only survived around 10 years.

54°23′29″N 10°11′10″E / 54.3914°N 10.1861°E / 54.3914; 10.1861