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

The Aga Khan, spiritual head of Ismaili Muslims. AP File Photo Paris- The Aga Khan, who became the spiritual leader ...

The Aga Khan, the spiritual leader of millions of Ismaili Muslims worldwide and a prominent philanthropist, passed ...

The Aga Khan, who became the spiritual leader of the world’s millions of Ismaili Muslims at age 20 as a Harvard undergraduate ...

Both a business magnate and a philanthropist who donated billions, he moved between the spiritual and the worldly and mixed ...

He became the Aga Khan IV on October 19, 1957, in Tanzania, on the spot where his grandfather once had his weight equalled in ...