The Crown of the Imperial King
There are two crowns belonging to the British monarch. One is St. Edward's Crown. The other is the Imperial State Crown. Normally, they are kept under strict security—alongside other royal treasures—in the Jewel House at the Tower of London, a site with deep historical ties to the monarchy. They are brought out for significant royal ceremonies, such as the coronation of a new monarch, who then wears the chosen crown to the event. While protocol dictates the use of St. Edward's Crown, it is actually quite heavy to wear—proving to be more than a little taxing, especially for those of advanced age. In contrast, the Imperial State Crown is somewhat lighter, so the latter is frequently used for occasions other than the coronation itself. Incidentally, it is said that Queen Elizabeth II used to practice wearing the crown as early as breakfast time to ensure she could handle it properly during the actual ceremony. She was truly a figure worthy of the title of Queen (unlike her son, haha).