|Release date||6 April 2001 (Update)|
|Leader||Lord Daquarius Rennard|
The Black Knights' Fortress is a castle north of Falador, Asgarnia and is home to the Black Knights. It is inhabited by Black Knights and Fortress guards. This area is used in the Black Knights' Fortress (quest) and is where King Arthur is being held in King's Ransom. It can be used as a training ground for players, but is almost always empty. On the second floor, Rangers and Mages, as well as members with halberds, can attack the black knight through the bars. It is a complex system of ladders and secret walls. This is also a great place to get your Black knight kill count up after you have done the Wanted! quest. In order to access the interior of the building you must be equipped with a Bronze helm and an iron chainbody, or a full Elite Black armour. Note that full black armour will not let you gain access to the building as the guard's door is the only one that can be opened. After the Black Knights' Fortress quest the player can use full Black armour in place of an iron chainbody and Bronze helm to gain access to the guards door. There are two ways of entrance, one is pass through the horde of Black Knights on the eastern side, or go around the western side of Ice Mountain, as there are no Black Knights there.
Because the Black Knights and White Knights are rivals, the building was presumably built around the same time as the White Knights' castle in Falador.