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.

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,

The leader of the world’s Ismaili Muslims, who harnessed entrepreneurship and philanthropy, died on Tuesday at his home in Lisbon, Portugal. He was 88