What is a tiara?

Explanation

A diadem is a head ornament in the shape of a headband. They are usually made from precious metals with mounted gemstones. In Antiquity, diadems often in the form of jewels or headbands to be worn on the forehead and in the hair, and were used as badges of dignity and majesty. Modern diadems came into fashion with the Empire-style around 1800. Today, true diadems are usually worn by women of royal houses, while ones made from cheaper materials have become a popular accessory.