Princess Diana's tragic death after paparazzi chased her down in Paris 15 years ago rocked not just Britain, but the world. More than a million mourners flooded London for her funeral, where Elton John performed "Candle in the Wind," which he originally wrote for Marilyn Monroe but rewrote for Diana. The song has since become the second-best selling single of all time at 33 million copies.
A few days before his wedding, Prince William is said to have taken Kate Middleton to visit the island where his mother's grave sits on the Althorp Estate in Northhampshire, England. A temple with limited visiting times for the public serves as a shrine to the late princess, who was known for her philanthropic work -- especially AIDS -- and for transforming the British monarchy.