The Aga Khan, imam of the Ismaili Muslims and head of a major development aid network, has died in Lisbon at the age of 88, his foundation announced on Wednesday. "His Highness Prince Karim Al-Hussaini,

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.

The Aga Khan IV, the spiritual leader of the world’s Shi’ite Ismaili Muslims, has died at the age of 88. The wealthy imam, who promoted a moderate form of Islam, has also been known for his multimillion-dollar development projects that have benefited communities throughout Asia and Africa.