Prince Karim Al-Hussaini, Aga Khan IV, the 49th hereditary Imam of the Shia Ismaili Muslims, passed away on February 4 at the age of 88 in Lisbon, surrounded by his family.

Karim, the former Aga Khan and longtime spiritual leader of millions of Ismaili Muslims, was known for both his global philanthropy and his extensive use of private jets.