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.

Prince Karim Aga Khan IV, the spiritual leader of millions of Ismaili Muslims around the world, has died at 88. A statement from his central philanthropic organization said he died "peacefully" in Lisbon on Tuesday.