Since, he has taken on the role of a statesman with aplomb.
One of the last surviving people in Britain to have served in the Second World War, he turned his sense of duty to public life, finally retiring at 96.
Always, the royal was impeccably turned out.
READ MORE: Prince Philip dead: Huge crowd gathers outside Buckingham Palace to pay respects
A spectacularly well-cut jacket and a sporting tie, along with a pair of Wayfairer-style glasses was a uniform for the royal.
He often wore a jaunty trilby hat, especially to observe his favorite sports including, of course, polo.
Philip was a fan of a double-breasted suit jacket, worn with a discrete, light-coloured pocket square and a sharp tie.
In colder weather, the Duke was often wrapped in a British of staple and style, the trench coat.
Whether to church or to a Remembrance Day service, the importance of the military to his life was never far from his wardrobe.
The Duke has passed his love of sharp style to his son Prince Charles, 72.
Charles, who has often been placed on best-dressed lists, is also a fan of a well-made suit.