First worn by women in the 15th century, what is a hennin?

The hennin 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 rarely seen in Italy.

They appeared 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, they were known to be over 29", (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.