Prince Philip, the husband of Britain’s Queen Elizabeth has died. The royal family said he was 99 years old on Friday. The Duke of Edinburgh was Prince Philip's official name. He had been by his wife’s side as she led the country for 69 years. She has been queen longer than any other ruler in British history. The British royal family said in a statement, “It is with deep sorrow that Her Majesty The Queen announces the death of her beloved husband, His Royal Highness The Prince Philip, Duke of Edinburgh.” “His Royal Highness passed away peacefully this morning at Windsor Castle. Further announcements will be made in due course. The Royal Family join with people around the world in mourning his loss.” Philip was born into the royal families of Greece and Denmark. His father was Prince Andrew of Greece and Denmark and his mother was Princess Alice of Battenberg. Philip married Elizabeth in 1947. He helped to bring the British royal family tradition into modern life after World War Two. In Buckingham Palace, the official royal family home, he was said to be the one person the queen could turn to and trust.