President Uhuru Kenyatta with His Highness the Aga Khan at State House, Nairobi, in 2018. Also present is Deputy President William Ruto.

Indian Spiritual Leader, His Highness The Aga Khan speaks during the laying of a foundation stone at the Aga Khan Acadamy in Tanzania's capital Dar es Salaam on March 17, 2005.

Canadian Prime Minister Paul Martin (L) meets His Highness the Aga Khan, 49th Hereditary Imam of Shia Imami Ismaili Muslims, in Ottawa June 6, 2005.

His Highness the Aga Khan shows his delight with jockey Mick Kinane (left) after his horse Azamour won the Prince of Wales Stakes.

Queen Elizabeth II talks with His Highness Aga Khan, the owner of winning horse Azamour ridden by jockey Mick Kinane who won the King George VI and Queen Elizabeth Diamond Stakes

His Highness Aga Khan speaks with Budget minister Jean-Francois Cope during the 85th Prix de l'Arc de Triomphe horse race at the Longchamp race track in Paris, France on October 1, 2006.

His Highness the Aga Khan (left) with his daughter Princess Zahra (right) before he was honoured by the National University of Ireland, Maynooth for his work against poverty and in promoting religious understanding.

His Highness the Aga Khan who was honoured by the National University of Ireland, Maynooth, for his work against poverty and in promoting religious understanding.

US Secretary of State Hillary Clinton (right) speaks with His Highness the Aga Khan before posing for a photograph ahead of the Afghanistan London Conference at Lancaster House, London.

His Highness the Aga Khan and Canada's Prime Minister Stephen Harper (R) view a model of Ismaili Centre and Aga Khan Museum for Islamic Art and Culture and their Park during the foundation ceremony in Toronto May 28, 2010.

(L-R) Baron Edouard de Rothschild, Micky Green, his Highness the Aga Khan and Princess Zahra Aga Kahn at the awarding ceremony following the 161st Prix de Diane horse racing at Chantilly horsetrack near Paris, France, on June 13, 2010.

His Highness the Aga Khan and Zahra Aga Khan attending the 90th edition of the Qatar Arc de Triomphe prize at the Longchamp racecourse on October 2, 2011 in Paris, France.

Canada's Prime Minister Stephen Harper and his Highness the Aga Khan unveil a plaque to officially open the Ismaili Centre and Aga Khan Museum in Toronto September 12, 2014.

Canada's Prime Minister Stephen Harper and his Highness the Aga Khan stand on a terrace overlooking the Aga Khan Museum in Toronto September 12, 2014. The two officially opened the Ismaili Centre and Aga Khan Museum in Toronto. 

The Aga Khan, spiritual leader of Ismaili Muslims, looks on during a speaking event at Massey Hall in Toronto, February 28, 2014. 

French jockey Christophe Soumillon (C) celebrates with horse owner H.H. Aga Khan (L) after winning Queen Anne Stakes on Valixir at Royal Ascot in York on the first day of the meet, June 14, 2005.

The Aga Khan (R) receives the Derby trophy after his horse Kayhasi won the race in Epsom, England. June 1, 1988.

His Highness the Aga Khan addresses the audience at an award ceremony and dinner during the 35th anniversary International Development convention at the Washington, DC Convention Center.  March 18, 1987

Former U.S. President Jimmy Carter (L-R), the Aga Khan, former Canadian Governor-General Romeo LeBlanc and Cuban President Fidel Castro attend the state funeral for former Canadian Prime Minister Pierre Trudeau in Montreal, October 3, 2000.

Britain's Prince Charles is greeted by the Aga Khan during a visit to the Ismaili Centre to join a reception to celebrate their 25th anniversary in London, November 18, 2010.

The Aga Khan (L), spiritual leader of Ismaili Muslims, and California Governor Arnold Schwarzenegger talk in Santa Monica, California, April 14, 2008.

The Aga Khan, 49th Hereditary Imam of Shia Imami Ismaili Muslims, waves after his arrival at Madrid's Torrejon airbase, Spain May 21, 2004.

The Aga Khan, spiritual leader of Ismaili Muslim sect, takes part in the opening ceremony of the new delegation of the Ismaili Imamat in Ottawa December 6, 2008.

President of the Republic of Portugal, Marcelo Rebelo de Sousa, officially welcomes His Highness the Aga Khan to Portugal at the Belem Palace where he was received with State honours on the occasion of the Aga Khan's Diamond Jubilee.

His Highness the Aga Khan expresses his thanks to the French government for their partnership after receiving the Grand Cross of the Legion of Honour (Grand-croix dans l’Ordre national de la Légion d’honneur

His Highness the Aga Khan and His Royal Highness the Prince of Wales at Buckingham Palace. Ian Jones  LONDON - UK - 12th March 2019: HRH The Prince of Wales hosts a dinner for the Prince's Trust International at Buckingham Palace in London.

President Mwai Kibaki and His Highness the Aga Khan and Medical services minister arrive for the launch of Heart and cancer centre at the Aga Khan University Hospital in Nairobi on July 25 2011. The hospital uses state of the art technologies, which include Cardiac operating theaters.

 Her Majesty the Queen with His Highness the Aga Khan at a dinner hosted by Her Majesty at Windsor Castle.