Today marks King Charles III's Coronation, in which he has been officially crowned alongside his wife Queen Camilla in a historic ceremony.
The 74-year-old King is wearing St Edward's Crown as part of the service, conducted by the Archbishop of Canterbury.
This will be the first and only time that Charles, 74, will wear the 17th-century crown which was last worn by Queen Elizabeth II during her Coronation, reports the Mirror.
Here is everything you need to know about the historic item, including its royal history and its insane valuation.
The crown King Charles III wears at his Coronation
As per royal tradition, Charles will be officially crowned as King with St Edward's Crown during the Coronation.
It was recently removed from the Tower of London to be resized for the King ahead of the monumental service.
Charles will then switch to the lighter Imperial State Crown at the end of the ceremony to leave the Abbey, as is custom.
What is the value of the St Edward's Crown?
Although the exact value of the crown has been heavily debated over the years, experts have speculated that it is worth between £3 billion and £5 billion.
St Edward's Crown is made of solid gold, with a velvet cap and ermine band. It weighs nearly five pounds in total and bears 444 gemstones, including rubies, sapphires, garnets and tourmalines.
What is the history of St Edward's Crown?
St Edward's Crown was made for King Charles II in 1661, as a replacement for the medieval crown that had been melted down in 1649.
The original crown was thought to date back to the eleventh-century royal saint, Edward the Confessor.
St Edward's Crown is only used during coronation ceremonies and was worn by Her Majesty Queen Elizabeth II at her coronation in 1953.
The late monarch revealed in 2018 that she also had the crown resized to fit her head.
What crown will Camilla wear at the King's coronation?
Camilla will be crowned in Queen Mary's crown, which has been altered to include some of the late Queen's jewels, such as the Cullinan III, IV and V diamonds.
These were part of Queen Elizabeth II's personal jewellery collection for many years.
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