Aga Khan IV, Prince Shah Karim Al Hussaini, the spiritual leader of Nizari Ismaili Muslims worldwide, is dead. He passed away in Lisbon at the age of 88, his development network said on Tuesday. “His Highness Prince Karim Al-Hussaini,

Hussaini, son of Prince Karim Al-Hussaini Aga Khan IV, has been named in his father’s will as his successor to lead the Nizari Ismailis, a Shia Muslim denomination. We take a look at this branch of Shia Islam that has 15 million members worldwide.

At the age of 20, Prince Karim Al-Hussaini inherited the reins of a Shia Muslim lineage and used his entrepreneurship to become one of the world’s richest hereditary rulers.