Camilla, who is married to King Charles III, will be given Queen Mary’s crown at his coronation.

Buckingham Palace has confirmed that Camilla, who is married to King Charles III, will wear Queen Mary’s Crown at the historic coronation in May. The crown has been taken off display so that it can be fixed.

The royal family announced the big news Tuesday on their official Twitter account: “Queen Mary’s Crown has been taken off display at the Tower of London for repairs before the Coronation, when The Queen Consort will wear it.”

The crown is more than a hundred years old. It was made for Queen Mary’s coronation with King George V in 1911. It is being changed before the important event on May 6.

According to the palace, this is the first time in recent history that an existing crown will be used to crown a consort instead of a new one being made. The move was made “in the interests of sustainability and efficiency,” the palace said.

The crown will be re-set with several Cullinan diamonds before Camilla’s coronation.