Yui Mok/PA
Prince Philip tips his bowler hat at his last solo public engagement on August 2, 2017
Prince Philip turns 97 on Sunday - and it's been over a year since he announced his official retirement from public service.
According to The Telegraph, the Duke of Edinburgh has carried out 22,219 solo engagements and 637 solo visits overseas since he left active military service in 1952.
In retirement, the Duke is reportedly enjoying more leisure time at the Sandringham Estate in Norfolk - he is an avid carriage driver and enjoys oil painting.
His Royal Highness' career will be remembered equally for his sharp wit as he will be for his gaffes, which have often left the nation laughing or reeling.
The Prince's prolonged service has won him support from both sides of Parliament - Jeremy Corbyn applauded his "clear sense of public duty" and Theresa May praised his "steadfast support" to the Queen.
Philip's lengthy career, marked by hundreds of visits to far-flung corners of the British Empire, has unsurprisingly produced some remarkable royal photography.
As he turns 97, here are the best images from each of his years as Prince Philip, Duke of Edinburgh: