He was forced to miss a pre-Easter religious service last week, however, because he was having trouble with his hip.
At a ceremony commemorating Britain's war dead last November, he appeared to be having trouble standing and leaned against a wall.
Philip has been a constant and mischievous presence at royal functions for decades and is perhaps better known for punctuating royal pomp with a taste for off-colour jokes.
"You managed not to get eaten, then?" was one typical remark to a British student who had trekked in Papua New Guinea in 1998.
"He has, quite simply, been my strength and stay all these years," the queen said in a golden wedding anniversary speech in 1997.
Prince Philippos of Greece and Denmark was born on a kitchen table on Corfu on June 10, 1921, the only son of prince Andrew of Greece -- the younger brother of Greece's king Constantine -- and princess Alice of Battenberg.
Aged just 18 months, he and his family were evacuated in a British Royal Navy ship from politically unstable Greece, with the toddler reputedly carried in a cot made from an orange box.
The family settled in Paris, sending the young Philip to preparatory school in England when he was just seven, secondary school in southern Germany, and then to the austere Gordonstoun in Scotland, where he was head boy.
They kept in touch during the war and met on a number of occasions. But it was not until July 1947 that their engagement was announced and they tied the knot that year on November 20 at Westminster Abbey.
In his spare time Philip has been a keen horseman, competing at international level for Britain in the sport of carriage-driving.
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