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,

Ceremonies were being held Tuesday in Ismaili communities in the U.S. and others were held elsewhere in the world Wednesday.

The death of the Aga Khan, who was the spiritual leader of the world’s millions of Ismaili Muslims, struck a deep chord with Houston’s Ismaili Muslim community