The Castle theme is one of LEGO’s primary themes first introduced in 1978 and based around medieval life with castles and knights. It is currently the third longest-lived theme in LEGO history. Over the years it saw numerous changes thus introducing various fantasy elements.
1979 LEGO Sets
In 1979, LEGO introduced the Fabuland theme, targeting younger children with a blend of larger parts and regular LEGO bricks. The theme featured anthropomorphic animal characters and provided a storytelling aspect. This year also saw the expansion of the LEGO Space theme, with additional sets being added. Furthermore, the LEGO Castle theme was launched, offering medieval-themed sets with castles, knights, and related elements. These developments in 1979 contributed to the diversification of LEGO's product offerings.