Prince Philip became the third oldest British royal, reaching 35,742 days of age on Friday.
The previous record-holder was Princess Alice, Countess of Athlone-one of Queen Victoria’s granddaughters. She was 97 years and 10 months old when she died in 1981.
The oldest British royal of all time was Princess Alice, Duchess of Gloucester, who was 102 years old when she died. She is followed by Queen Elizabeth, who died at the age of 101.
In 2013, Prince Philip became the oldest living male British royal in history.
In addition to this, he is also the longest living descendant of Queen Victoria.
He is set to celebrate his 98th birthday on June 10.
Prince Philip and Queen Elizabeth celebrated their 71st wedding anniversary last November, and he also retired from public life in May 2017.
Buckingham Palace stated: “His Royal Highness The Duke of Edinburgh has decided that he will no longer carry out public engagements from the autumn of this year. In taking this decision, The Duke has the full support of The Queen.”