London, England (CNN) -- Britain's Prince Philip, the husband of Queen Elizabeth, is going to scale back his activities when he turns 90 next year, Buckingham Palace said Tuesday.
Philip, the Duke of Edinburgh, is patron or president of more than 800 organizations and charities, the palace said.
"When he reaches his 90th birthday, he has decided to stand down from a number of organizations with which he is directly associated in order to ensure their continuity."
Among his public roles, the prince is president emeritus of the World Wildlife Fund for Nature and chancellor of the Universities of Edinburgh and Cambridge.
It is possible that Kate Middleton could take up some of Philip's many posts after she marries Prince William next year, The Daily Telegraph speculated, saying it might help ease her into royal life.