An important difference between Princess Diana's and Prince Philip's funeral ceremonies will be an open casket versus a closed casket.
Why Princess Diana's Casket Wasn't Open During Her Funeral
Over 20 years ago, the world came together to grieve Princess Diana at her funeral. Approximately 60 million flowers were left in front of Buckingham Palace and around London in her honor, as reported by Town & Country. Prince William and Prince Harry, who were 15 and 12 years old at the time, walked behind their mother's coffin in the funeral's one-mile procession.