Billionaire and Islamic spiritual leader the Aga Khan died on Tuesday aged 88, leaving millions of followers in mourning across the world. Prince Karim al-Husseini was regarded as a direct descendent of the Prophet Mohammed, given nearly divine-status as the 49th hereditary imam of the Ismaili sect of Shia Islam. The spiritual leader was also known for his development work around the world and his interest in race horsing. brings you the legacy of the Aga Khan.