Queen Elizabeth's Imperial State Crown arrives at the Royal Gallery before the State Opening of Parliament in the House of Lords, at the Palace of Westminster in London.

A crown frame of a double circlet of gold with silver jewel settings, no longer mounted with stones. The arches in the form of oak leaves, the monde missing, with a red velvet cap and ermine band.

As King Charles is officially crowned, here are the photos that are sure to go down in history.

George I's state crown in a watercolor by Giuseppe Grisoni, 1718. The Black Prince's Ruby dominates the front.

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Learn all about the real Imperial State Crown that Queen Elizabeth wore during her coronation

British Royal Family on Instagram: "Crowns in the Jewel House at the Tower of London: Collage 1 - Crowns worn by Sovereigns: 1. St Edward’s Crown 2. The Imperial State Crown 3. The Imperial Crown of India 4. Queen Victoria’s Small Diamond Crown Collage 2 - Crowns worn by Consorts: 1. Queen Alexandra’s Crown 2. Queen Mary’s Crown 3. Queen Elizabeth The Queen Mother’s Crown Collage 3: Prince of Wales Coronets: 1. Prince Frederick’s Coronet 2. Prince George’s Coronet 3. Prince Charles’

Queen Elizabeth II and Prince Philip leave Buckingham Palace in a horse drawn carriage on their way to the Houses of Parliament on May 18, 2016 in London, England. The State Opening of Parliament is the formal start of the parliamentary year. This year's Queen's Speech, setting out the government's agenda for the coming session, is expected to outline policy on prison reform, tuition fee rises and reveal the potential site of a UK spaceport. Queen Elizabeth II and Prince Philip leave…

State crown of George VI.Back of the Imperial State Crown (made in 1937 with alterations in 1953)