The Duke of Edinburgh was an incredibly active man, who enjoyed good health well into his later years.
But as his age advanced beyond 90, concerns for his well-being increased after he faced a number of scares.
Abdominal surgery, bladder infections, a blocked coronary artery and a hip replacement saw him admitted to hospital on a number of occasions.
The “Iron Duke”, as he was dubbed, underwent heart surgery just three months before what would have been his 100th birthday and he was hospitalised for a month before returning to Windsor Castle.
In October 2013, despite having to spend two months convalescing following an operation on his abdomen, the duke appeared sprightly and walked unaided on an official visit to a care home when, at 92, he was older than many of the residents.