The Black Knights were a faction of the Castle theme introduced in 1998. A total of 13 sets were released containing 3 major castles. Most of the castles and fortification where colored black and their symbol was a wyvern dragon. While The Black Knights subtheme was discontinued after 1994 the crest was still used in later sets.
1998 LEGO Sets
In 1998, LEGO released several new sets and themes, including the LEGO Star Wars theme, which was based on the Star Wars movies and featured models of characters, vehicles, and locations from the films. This theme was extremely popular and helped to boost LEGO's sales and popularity. 1998 was also the year that LEGO introduced the LEGO Mindstorms theme, which was a line of sets that allowed users to build and program robots using LEGO bricks and a computer.