We will use your email address only for sending you newsletters. Please see our Privacy Notice for details of your data protection rights.

Sign up fornow and never miss the top Royal stories again.

Queen Elizabeth II and the Aga Khan in the White Drawing Room at Windsor Castle

The Aga Khan was joined by Princess Salwa Aga Khan and Princess Zahra Aga Khan, the eldest child of Aga Khan IV.

Prince Charles and the Duchess of Cornwall also joined in the celebrations at Windsor Castle.

Aga Khan is a title used also as a name by the Imam of the Nizari Ismailis. The current user of the name is the 49th Imam, Prince Shah Karim Al Husseini Aga Khan IV.

He is the founder and chairman of the Aga Khan Development Network, one of the largest private development networks in the world. The organisation has said it works toward improvement of the environment, health, education,, culture, rural development, disaster reduction, and the revitalisation of historic cities.

Forbes described the Aga Khan as one of the world's ten richest royals.

The Diamond Jubilee Year of the Aga Khan's 60th year of Imamat is from 11 July 2017 to 11 July 2018.