Many crowns

Crown (headgear)

A crown is the traditional symbolic form of headgear worn by a monarch or by a deity, for whom the crown traditionally represents power, legitimacy, immortality, righteousness, victory, triumph, resurrection, honour and glory of life after death. In art, the crown may be shown being offered to...

 worn by monarch

Monarch

A monarch is the person who heads a monarchy. This is a form of government in which a state or polity is ruled or controlled by an individual who typically inherits the throne by birth and occasionally rules for life or until abdication...

s have jewelled cross pattée

Cross pattée

A cross pattée is a type of cross which has arms narrow at the centre, and broader at the perimeter. An early English example from the start of the age of heraldry proper A cross pattée (or "cross patty", known also as "cross formée/formy") is a type of cross which has arms narrow at the...

(or pattée) symbols mounted atop the band. Most crowns possess at least four such crosses, from which the half arches

Half-arch (crown)

A half-arch is the piece of gold, silver or platinum, usually decorated with jewels, that links the circlet of a hoop crown to the globe at the top of the crown.-British tradition of 4 half-arches:...

 rise. Some crowns are designed so that the half-arches can be detached from the crosses pattée, allowing it to be worn on occasion as a circlet

Circlet

A circlet is a crown with neither arches nor a cap ....

.

A cross pattée is particularly associated with crowns in Christian

Christian

A Christian is a person who adheres to Christianity, an Abrahamic, monotheistic religion based on the life and teachings of Jesus of Nazareth as recorded in the Canonical gospels and the letters of the New Testament...

 countries. It is often heavily jewelled, with diamonds and precious stones. The Koh-i-Noor

Koh-i-Noor

The Kōh-i Nūr which means "Mountain of Light" in Persian, also spelled Koh-i-noor, Koh-e Noor or Koh-i-Nur, is a 105 carat diamond that was once the largest known diamond in the world. The Kōh-i Nūr originated in the state of Andhra Pradesh in India along with its double, the Darya-ye Noor...

 diamond is set in a cross pattée on the Crown of Queen Elizabeth

Crown of Queen Elizabeth

The Crown of the Queen Mother is the platinum crown manufactured for, and worn by, Queen Elizabeth, the former Lady Elizabeth Bowes-Lyon, the queen consort of King George VI of the United Kingdom at their coronation in Westminster Abbey in 1937...

 (Elizabeth Bowes-Lyon

Elizabeth Bowes-Lyon

Elizabeth Angela Marguerite Bowes-Lyon was the queen consort of King George VI from 1936 until her husband's death in 1952, after which she was known as Queen Elizabeth The Queen Mother, to avoid confusion with her daughter, Queen Elizabeth II...

). Similarly, a cross pattée on the Imperial State Crown

Imperial State Crown

The Imperial State Crown is one of the Crown Jewels of the United Kingdom.- Design :The Crown is of a design similar to St Edward's Crown: it includes a base of four crosses pattée alternating with four fleurs-de-lis, above which are four half-arches surmounted by a cross. Inside is a velvet cap...

 holds the Black Prince's Ruby

Black Prince's Ruby

The Black Prince's Ruby is a bead-shaped spinel weighing roughly , approximately the size of a chicken egg. It is currently set in the cross pattée above the Cullinan II in the front of the Imperial State Crown...

.