For years, prior to his death on April 9 at age 99, Prince Philip was instrumental in shaping William for the rigors that come with ruling over a nation – a position Queen Elizabeth II has held for 69 years since she took the throne on Feb. 6, 1952.

For years, prior to his death on April 9 at age 99, Prince Philip was instrumental in shaping William for the rigors that come with ruling over a nation – a position Queen Elizabeth II has held for 69 years since she took the throne on Feb. 6, 1952.