Here we look back at some of those memories of Prince Philip in pictures.
9. Queen Elizabeth II And Duke Of Edinburgh Visit Northern Ireland - Day 3
COLERAINE, NORTHERN IRELAND - JUNE 25: Queen Elizabeth II and Prince Philip, Duke of Edinburgh pay their respects at the cenotaph in Coleraine during the launching of World War One commemorations, on the third and final day of the Queen's visit to Northern Ireland, on June 25, in Coleraine, Northern Ireland. (Photo by Paul Faith - WPA Pool/Getty Images) Photo: Getty Images Europe
10. Queen Elizabeth II And Duke Of Edinburgh Visit Northern Ireland - Day 3
COLERAINE, NORTHERN IRELAND - JUNE 25: Queen Elizabeth II and Prince Philip, Duke of Edinburgh arrive at the cenotaph in Coleraine during the launching of World War One commemorations, on the third and final day of the Queen's visit to Northern Ireland, on June 25, in Coleraine, Northern Ireland. (Photo by Paul Faith - WPA Pool/Getty Images) Photo: Getty Images Europe
11. Queen Elizabeth II And Duke Of Edinburgh Visit Northern Ireland - Day 3
COLERAINE, NORTHERN IRELAND - JUNE 25: Queen Elizabeth II and Prince Philip, Duke of Edinburgpay their respects at the cenotaph in Coleraine during the launching of World War One commemorations, on the third and final day of the Queen's visit to Northern Ireland, on June 25, in Coleraine, Northern Ireland. (Photo by Paul Faith - WPA Pool/Getty Images) Photo: Getty Images Europe
12. Queen Elizabeth II And Duke Of Edinburgh Visit Northern Ireland
COLERAINE, NORTHERN IRELAND - JUNE 25: (EDITORIAL USE ONLY, NO SALES) In this handout image provided by Harrison Photography, Queen Elizabeth II and Prince Philip, Duke of Edinburgh attend a Coleraine Borough Council reception to acknowledge the contribution that the Royal British Legion has made to improve the wellbeing of veterans and their families on June 25, 2014 in Coleraine, Northern Ireland. The Royal party are visiting Northern Ireland for three days. (Photo by Marie Therese Hurson/Harrison Photography via Getty Images) Photo: Getty Images Europe