Princess Di - London
The "wedding of the century" between Lady Diana Frances Spencer and Charles, Prince of Wales took place in London's St. Paul's Cathedral in front of a crowd of 3,500 and a TV viewing audience of another 750 million. Another two million spectators lined the route Diana took to the church. More recently, the new "wedding of the century" was hosted at Westminster Abbey between another Prince of Wales, William, and his bride Kate Middleton.
Photo courtesy of S-Marsden/iStock