The title of Aga Khan was first bestowed upon Hasan Ali Shah (1804-1881), the 46th Imam of the Nizari Ismailis, by the Iranian king Fath-Ali Shah Qajar in the 19th century. Many years later ...
Aga Khan was the leader of the Nizari branch, which believes in a living imam or leader. The second branch – Musta'lian Tayyibi Ismailis – believes that its 21st imam went into “concealment ...