The official coronation portrait of Britain’s King Charles was made public on Tuesday, two years after he was crowned, in a tradition dating back more than 400 years to a time when such a painting often became the defining image of a monarch.

Coronation portraits have for centuries been a traditional part of the crowning of a monarch. Queen Elizabeth II’s, by Herbert James Gunn, showed her in the Throne Room at Buckingham Palace, the crown and scepter on a table beside her — symbols of rule that traditionally appear in coronation portraits.

Queen Camilla and King Charles III set out to London’s National Gallery on Tuesday to unveil official coronation portraits two years after the historic ceremony. The portraits of King Charles III and Queen Camilla will be displayed in the National Gallery for one month before they are removed to their permanent home at Buckingham Palace.