Las Vegas Sun - Photograph : Prince Charles and Princess Diana

November 23, 2017

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In this July 29, 1981, file photo, the carriage carrying the Prince and Princess of Wales passes along Trafalgar Square on its way from St. Paul's Cathedral to Buckingham Palace after the royal wedding in London. A 33-year-old slice of cake from Prince Charles and Princess Diana’s 1981 wedding has sold at auction for $1,375.

The Associated Press

In this July 29, 1981, file photo, the carriage carrying the Prince and Princess of Wales passes along Trafalgar Square on its way from St. Paul's Cathedral to Buckingham Palace after the royal wedding in London. A 33-year-old slice of cake from Prince Charles and Princess Diana’s 1981 wedding has sold at auction for $1,375.