Which country has the oldest continuous hereditary monarchy?
Japan's imperial family is considered the oldest continuous hereditary monarchy in the world, with traditional records tracing the line back more than 1,500 years.
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Monarchy facts and facts about monarchies, from the Random Facts shelf.
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When did Charles III become king of the UK?
Charles III became king of the UK on September 8, 2022, after the death of his mother, Queen Elizabeth II, who had reigned for 70 years.