Did you know that the world's oldest monarchy is not the British one? If not, then this quiz will certainly open your eyes to some interesting facts! Japan's 85-year-old Emperor Akihito will relinquish the imperial throne to his eldest son Crown Prince Naruhito (54) on Tuesday. The abdication marks the end of his three-decade reign, also known as the Heisei era. The new emperor will receive a sword, a jewel and official seals in a sacred ceremony called Taiirei-Seiden-nogi, or main Ceremony of the Abdication of His Majesty the Emperor, which will be held in the Matsu-no-Ma state room in the Imperial Palace. But the event is set to create history in more ways than one. How? Play this quiz and unlock the answers to all your questions!