The term 'The AGA Khan' refers to the title held by the Imam of the Nizari Ismaili Muslims, a denomination of Shia Islam. The current AGA Khan is Prince Shah Karim Al Hussaini, who has held the title since 1957. He is the 49th hereditary Imam of the Nizari Ismaili Muslims and is also the founder and chairman of the AGA Khan Development Network, an organization that works to improve the quality of life of people in the developing world.