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.

Ismaili Muslims said a last goodbye on Saturday to their late spiritual leader, Aga Khan IV, at a private funeral ceremony in Lisbon attended by dignitaries and foreign leaders.

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,