Buckingham Palace said Philip died peacefully in his sleep at Windsor Castle, leaving the Queen and the royal family "mourning his loss".
His death triggered a flood of tributes from across the globe - with world leaders, foreign royal families and charities hailing his life and legacy.
Philip's funeral is expected to take place at St George's Chapel in Windsor, but the ongoing Covid-19 lockdown will impact plans.
Under current rules in England, services can only be attended by a maximum of 30 people.
Helping to draw up the details of the occasion himself, the duke was known to have wanted a minimum of fuss at his funeral.
It has long been known that it will be the Queen who has the final say over the plans to lay to rest her husband of more than 70 years.
Buckingham Palace has said: "During the coronavirus pandemic, and in light of current Government advice and social distancing guidelines, modified funeral and ceremonial arrangements for His Royal Highness the Duke of Edinburgh are being considered by Her Majesty The Queen. Details will be confirmed in due course."
An online book of condolence was opened on the royal family's official website for the public to post personal tributes.
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