The 17th-century crown is the centerpiece of the Crown Jewels, displayed at the Tower of London and annually visited by more than a million visitors.
The crown was last worn by Queen Elizabeth II at her coronation in 1953.
It will now be worn by King Charles III at his coronation on May 6.
After the coronation, Charles will wear the Imperial State Crown, created in 1937 for the coronation of King George VI.