| Fort Harssens | |
|---|---|
| Den Helder in Netherlands | |
 The fortress somewhere between 1895 and 1915 | |
  Fort Harssens | |
| Coordinates | 52°57′50″N 4°46′54″E / 52.964002°N 4.781530°E |
| Site history | |
| Built | 1884 |
Fort Harssens is a former fortress and museum in Den Helder North-Holland. It protected the naval base Willemsoord. The fortress had 4 heavy naval guns placed in two armored cupolas. Nowadays, the maritime traffic control center sits on top of the fortrress.