The Great Helm of the High Middle Ages arose in the late 12th century in the context of the crusades and remained in use until the 14th century. They were used by knights and heavy infantry in most European armies. In its simplest form, the great helm was a flat-topped cylinder of steel that completely covered the head and had only very small openings for the eyes and mouth. Later designs gained more of a curved design, particularly on the top, to deflect or lessen the impact of blows. The BrickForge Great Helm features eye-slits that lineup with most standard minifig face designs and a standard plume socket on top. Fits most standard minifig heads.