What is crown in heraldry?

In heraldry, a crown is a symbol of power, sovereignty, and nobility. It is usually depicted as a headpiece, made up of different elements such as jewels, spikes, and crosses, arranged in a particular style. The style and design of a crown can vary depending on the country and rank of the person that it represents. For example, a royal crown will have a more elaborate design than a nobleman's crown. There are also different types of crowns, such as a closed crown (indicating a sovereign ruler) or an open crown (indicating a non-sovereign ruler). Crowns are often used as a charge (a symbol or emblem) in heraldry, appearing on shields, flags, and coats of arms.