King Charles III will officially be crowned on May 6 at Westminster Abbey, more than a century from when his great grandfather King George V travelled to India to attend his coronation. The ceremony will see King Charles wear the St Edward's Crown and Queen Camila wear Queen Mary's Crown, which contained three large diamonds, the Koh-i-nur, Cullinan III and IV. The Cullinan II diamond was removed from the crown and is now in the Imperial State Crown. King George V's Mumbai Durbar was in 1911 and historic, marking the shifting of the imperial capital from Calcutta to Delhi and was attended by the Emperor himself.