King Charles III: What is the Coronation roll?

King Charles has received the official record of his Coronation.

For at least 700 years, kings and queens have received a hand-written document, called the Coronation roll, describing the moment they are officially crowned as monarch.

At 21-metres, which is about two-and-a-half times as long as a London bus and containing 11,600 words, the King said it seemed to "go on for miles".

Queen Camilla said she'd need her "specs" to read it!

Historically the roll was useful evidence of the monarch's legitimacy, which means he has the right to be King.

The roll is a very long document (almost like a roll of wallpaper) that contains details about the Coronation service, including who attended as guests.

Unfortunately for Katy Perry and Ant and Dec, who were invited to Westminster Abbey last May, celeb guests aren't named.

It does name those with a ceremonial role, alongside the royal guests, politicians and representatives from other countries.

For the first time this year, there will also be an online video version of the record.

A bit different compared to the oldest surviving roll, which marked Edward II's Coronation and has been kept in the Tower of London since 1308!

It is also the first time the roll has not been written on materials made from animal skin, but on paper instead.

The roll will be stored in the National Archives for future historians.

"In medieval times when the crown was contested a lot more, these were important records of the authority of an incoming monarch," says Dr Sean Cunningham from the National Archives.

Over the centuries, monarchs started to use old rolls as a guide to arranging their own coronations - medieval rolls were used as a guide for James II's Coronation in 1685.

The roll used to be written in Norman French and Latin - it wasn't until the Coronation of George IV in 1820 that a roll was written fully in English.

The huge document was hand written over the course of 56 days straight.

Known as a calligrapher, Stephanie von Werthern-Gill kept her phone off to make sure she was concentrating, and only made one mistake, missing out a single dot over an i - impressive!

It also includes artwork by Tim Noad, who also designed the king's cypher (which is his special logo) that will soon to pop up on banknotes and post boxes.

The King described the roll as a "marvellous".

However the roll does not document the protests by people who don't support the monarchy, which took place during the Coronation.

It's expected to go on public display before heading for safe keeping in the National Archive.