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A 300-year rule is begging the question as to whether Queen Elizabeth technically has legal custody of her minor great-grandchildren.
In 1717, a major disagreement that King George I had with his son over how he was raising his children led to him being granted authority over his grandchildren. Judges ruled in the king’s favor, stating that the “king’s right of supervision extended to his grandchildren and this right of right belongs to His Majesty, King of the Realm, even during their father’s lifetime.”
But the centuries-old decree does not pertain to Queen Elizabeth’s authority over her own great-grandchildren, including Prince George, Princess Charlotte and Prince Louis.