Castle is a subtheme of Service Packs that consists of 5 sets that ran from 1989 to 1998. As of today, the average annual growth of sets in Service Packs Castle is approximately 7.4% per year.
The LEGO Service Packs for the Castle theme provided additional pieces and accessories to enhance the main Castle sets, which have been a staple of the LEGO lineup since the 1980s. These service packs typically included extra minifigures, weapons, shields, armor, horses, and various castle accessories. They were designed to expand and customize the medieval settings, allowing builders to create larger armies, more detailed fortifications, and richer battle scenes. Notable elements often found in these packs include knights, archers, and other medieval characters, as well as unique weaponry and heraldry to distinguish different factions within the Castle theme.