The Aga Khan, who became the spiritual leader of the world’s millions of Ismaili Muslims at age 20 as a Harvard undergraduate and poured a material empire built on billions of dollars in tithes into building homes,

Rahim Al-Hussaini was named Wednesday as the new Aga Khan, spiritual leader of the world’s millions of Ismaili Muslims, following the death of his father.

Aga Khan, the spiritual leader of the world's 15 million Ismaili Muslims, has died at the age of 88. In a statement, it was announced that the 49th hereditary Imam, Mawlana Shah Karim Al-Hussaini, passed away surrounded by his family in Lisbon, Portugal on Tuesday.