Crowns

As an emblem
A crown is often an emblem of the monarchy, a monarch's government, or items endorsed by it. The word itself is used, particularly in Commonwealth countries, as an abstract name for the monarchy itself, as distinct from the individual who inhabits it. A specific type of crown (or coronet for lower ranks of peerage) is employed in heraldry under strict rules. Indeed some monarchies never had a physical crown, just a heraldic representation, as in the constitutional kingdom of Belgium, where no coronation ever took place; the royal installation is done by a solemn oath in parliament, wearing a military uniform: the King is not acknowledged as by divine right, but assumes the only hereditary public office in the service of the law; so he in turn will swear in all members of "his" federal government.
• Costume headgear imitating a monarch's crown is also called a crown. Such costume crowns may be worn by actors portraying a monarch, people at costume parties, or ritual "monarchs" such as the king of a Carnival krewe, or the person who found the trinket in a king cake.
• The Eastern Orthodox marriage service has a section called the crowning, wherein the bride and groom are crowned as "king" and "queen" of their future household. In Greek weddings, the crowns are diadems usually made of white flowers, synthetic or real, often adorned with silver or mother of pearl. They are placed on the heads of the newlyweds and are held together by a ribbon of white silk. They are then kept by the couple as a reminder of their special day. In Slavic weddings, the crowns are usually made of ornate metal, designed to resemble an imperial crown, and are held above the newlyweds heads by their best men. A parish usually owns one set to use for all the couples that are married there since these are much more expensive than Greek-style crowns.