1785 to 1922, the castle was completely under military administration. During this period, a number of renovations were completed.
Recent history
The captain of every ship sailing through the strait had to state the value of ship's cargo. Money that had to be paid to the King of Denmark was then calculated depending on the value of the cargo. The king had the right to buy the cargo for the price the ship's captain stated. This policy prevented captains from stating prices that were too low. The Sound Dues were abolished in 1857 due to an American initiative.The army left the castle in 1923, and after a thorough renovation it was opened to the public in 1938
