A member of the public takes a photograph of an official notice announcing the death of Britain's Prince Philip, Duke of Edinburgh fixed on the railings of Buckingham Palace in central London on April 9, 2021. AFP

(FILES) In this file photo taken on December 25, 2012 Britain's Prince Philip, Duke of Edinburgh waves to well-wishers as he leaves following the Royal family Christmas Day church service at St Mary Magdalene Church in Sandringham, Norfolk, in the east of England, on December 25, 2012. AFP

File Photo: In this Nov. 23, 1955 file photo, Elizabeth Taylor curtsies as she is greeted by the Duke of Edinburgh at the premiere of "Cockleshell Heroes" at the Empire Theater in London. AP

FILE - In this March 23, 1964 file photo, Britain's Prince Philip shakes hands with Ringo Starr as co-Beatles from left, George Harrison, John Lennon and Paul McCartney look on, at the Empire Ballroom in London, England. AP

FILE - In this Nov. 20, 1947 file photo, Princess Elizabeth and her husband the Duke of Edinburgh pose with royal guests after their wedding, at Buckingham Palace in London, England. AP

File Photo: In this June 14, 2014 file photo, Britain's Prince Harry talks to Prince Philip as members of the Royal family appear on the balcony of Buckingham Palace, during the Trooping The Colour parade, in central London. Buckingham Palace officials say Prince Philip, the husband of Queen Elizabeth II, has died, it was announced on Friday, April 9, 2021. AP

In this Nov. 20, 1947 file photo, Britain's Princess Elizabeth and her husband the Duke of Edinburgh wave to the crowds on their wedding day, from the balcony of Buckingham Palace in London. AP

FILE - In this Sept. 6, 1997 file photo, from left, Britain's Prince Philip, Prince William, Earl Spencer, Prince Harry and Prince Charles walk outside Westminster Abbey during the funeral procession for Diana, Princess of Wales. AP

In this file photo taken on June 04, 2014 Britain's Queen Elizabeth II (L) seated on the Throne in the House of Lords next to Prince Philip, Duke of Edinburgh (R) prepares to deliver the Queen's Speech during the State Opening of Parliament at the Palace of Westminster in London on June 4, 2014. AFP

In this file photo taken on June 14, 2014 Britain's Queen Elizabeth II and Prince Philip, Duke of Edinburgh, watch as soldiers march past Buckingham Palace following the Trooping the Colour - Queen Elizabeth II's Birthday Parade, at The Royal Horseguards in London on June 14, 2014. AFP

(FILES) In this file photo taken on May 21, 2014 Britain's Queen Elizabeth II (L) and Prince Philip, the Duke of Edinburgh attend the first garden party of the year at Buckingham Palace in London on May 21, 2014. AFP

FILE - In this June 2, 1953 file photo, Britain's Queen Elizabeth II and her husband, the Duke of Edinburgh, wave from the balcony of Buckingham Palace, London, following the Queen's coronation at Westminster Abbey. AP

FILE - In this Aug. 1951 file photo, Princess Elizabeth stands with her husband the Duke of Edinburgh and their children Prince Charles and Princess Anne at the couple's London residence at Clarence House. AP

Members of staff attach an announcement, regarding the death of Britain's Prince Philip, to the fence of Buckingham Palace in London, Friday, April 9, 2021. AP

FILE PHOTO: Britain's Prince Philip, Duke of Edinburgh talks to Prince Harry as they leave after the wedding of Lady Gabriella Windsor and Thomas Kingston at St George's Chapel, in Windsor Castle, near London, Britain May 18, 2019. REUTERS

FILE - In this Wednesday, June 29, 2011 file photo, Britain's Queen Elizabeth II, bottom center, and Prince Philip, flanking her at left, face towards guests during the annual summer garden party held at Buckingham Palace in London. AP

(FILES) In this file photo taken on March 16, 2021 Britain's Prince Philip, Duke of Edinburgh leaves King Edward VII's Hospital in central London. AFP

(FILES) In this file photo taken on October 31, 1972 Britain's Queen Elizabeth II and Prince Philip, Duke of Edinburgh, pose at Balmoral Castle, near the village of Crathie in Aberdeenshire, in Aberdeenshire on October 31, 1972. AFP

FILE - In this Dec. 19, 1965 file photo, Britain's Queen Elizabeth II and Prince Philip is surrounded by member of her family on the grounds of Windsor Castle, in Windsor, England. From left, Princess Anne, Prince Charles, Prince Andrew. In the pram is Prince Edward. Prince Philip was born into the Greek royal family but spent almost all of his life as a pillar of the British one. His path was forged when he married the heir to the British throne, and a promising naval career was cut short when his wife suddenly became Queen Elizabeth II. Nevertheless, he set about forging a place for himself as royal consort. He was a patron of charities and a supporter of projects for young people. He was married for more than 73 years and was still carrying out royal engagements into his late 90s. AP