Prince Karim Al-Hussaini, known as the Aga Khan IV, has passed away at the age of 88. A prominent billionaire and philanthropist, he was the spiritual leader of approximately 15 million Ismaili Muslims worldwide. The Aga Khan was notable for his close friendship with Queen Elizabeth II and made significant contributions to various fields, including education and healthcare. His death has prompted an outpouring of tributes from around the world, reflecting on his impact and legacy within the Ismaili community and beyond.