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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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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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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