The hennin (hennin ˈhɛnᵻn; possibly from Flemish henninck meaning cock or rooster) was a headdress in the shape of a cone, steeple, or truncated cone worn in the Late Middle Ages by European women of the nobility. They were most common in Burgundy and France, but also elsewhere, especially at the English courts, and in Northern Europe, Hungary and Poland. They were little seen in Italy. It is unclear what styles the word hennin described at the time, though it is recorded as being used in French areas in 1428, probably before the conical style appeared. The word does not appear in English until the 19th century. The term is therefore used by some writers on costume for other female head-dresses of the period. This headgear was inspired by the headgear then current in the Mongol court.
With many characters or stories in pop culture, the Hennin is the element used to identify princesses of any kind, as well as that of courtesans or any important woman of royalty.
These appear from about 1430 onwards, especially after the mid-century, initially only among aristocratic women, though later spreading more widely, especially in the truncated form. Typically, the hennin was approximately between 11" and 18" (30 to 45 cm.) high, but might be considerably higher, as much as over 2'5" (80 cm.). The tops of some of these conical hats were pointed while others were truncated, ending in a flat top. It was generally accompanied by a veil (cointoise) that usually emerged from the top of the cone and was allowed to fall onto the woman's shoulders or even to the ground, or was pulled forward over the hennin, often reaching over the woman's face. The cointoise is the model for the scroll work around a Coat of Arms in Heraldry.
The hennin was worn tilted backward at an angle. It was made of light material, often card or a wire mesh over which a light fabric was fixed, although little is known of the details of their construction. There was often a cloth lappet (cornet) in front of the hennin, covering part of the brow, and sometimes falling onto the shoulders to either side.