Queen Elizabeth II Queen Elizabeth II

Queen Elizabeth II and Prince Charles attend the state opening of Parliament on Wednesday in London. This year, the ceremony was scaled back, with the queen arriving by car rather than carriage and not wearing the crown or robes of state. WPA Pool/Getty Images hide caption

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WPA Pool/Getty Images

Martin McGuinness, seen here arriving at 10 Downing Street in central London last October for meetings in his role as Northern Ireland's deputy first minister, has died at age 66. Daniel Leal-Olivas/AFP/Getty Images hide caption

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Daniel Leal-Olivas/AFP/Getty Images

King George III: Mad, villainous brute — or flawed, misunderstood man? A new, publicly available archive aims to give scholars and dabblers alike a chance to decide for themselves. This image was rendered in 1795, more than a decade after George nearly abdicated. William Perther/Library of Congress hide caption

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William Perther/Library of Congress

Queen Elizabeth II after recording her Christmas Day broadcast to the Commonwealth at Buckingham Palace on Dec. 24, 2016 in London, England. Yui Mok/WPA Pool/Getty Images hide caption

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Yui Mok/WPA Pool/Getty Images

Britain's Queen Elizabeth II cuts into a birthday cake baked by Nadiya Hussain (left), winner of The Great British Bake Off, during celebrations of the queen's 90th birthday in Windsor, England. John Stillwell/AP hide caption

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John Stillwell/AP

'British Bake Off' Winner Takes On The Toughest Judge Of All: The Queen

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Queen Elizabeth II and royal family members watch from a balcony at Buckingham Palace during her annual birthday parade in June. Chris Jackson/Getty Images hide caption

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Chris Jackson/Getty Images

A Milestone For A Beloved Monarch

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Windsor Castle, home to the British monarchy for hundreds of years, was built by William the Conqueror in the 1070s, according to the monarchy's official website. W. Buss/De Agostini/Getty Images hide caption

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W. Buss/De Agostini/Getty Images

Queen Elizabeth II wears 3-D glasses during a visit to the University of Sheffield, in 2010. This year, the queen's annual Christmas message will broadcast in 3-D. WPA Pool/Getty Images hide caption

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The British cleric Abu-Hamza al Masri, seen here in February 2003, is set to be extradited to the United States to face terrorism charges linked to the taking of 16 hostages in Yemen in 1998 and setting up a terrorist training camp in rural Oregon. Odd Andersen/AFP/Getty Images hide caption

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Odd Andersen/AFP/Getty Images

Queen Elizabeth II shook hands with Deputy First Minister of Northern Ireland Martin McGuinness today in Belfast. McGuinness is a former senior member of the IRA. Paul Faith/WPA Pool/Getty Images hide caption

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Paul Faith/WPA Pool/Getty Images