In 1984, the first "Black Falcons" castle was 6073 Knight's Castle. It came with six minifigures; two archers, two spearmen, and two knights mounted on horses. Like the yellow castle, the set featured special hinge pieces that could open up the castle to take a look inside and get at the interior. The Black Falcons were also featured in other sets the same year such as 6021 Jousting Knights and 6030 Catapult. In 1986, the Knight's Castle was replaced by the Black Falcon's Fortress. The overall structure and size of the set was similar to the previous Black Falcons castle, and included the same type of minifigures (including the two mounted knights). The main differences were that the two defense towers had been moved to the front, and were made with more rounded (octagonal) corner pieces, leaving room in the back for a small roofed structure with a yellow Tudor wall. This set was quite unique because it was the first set to include the octagonal corner pieces and the yellow Tudor wall, as well as the only set to have a blue Black Falcons flag.