His Highness Prince Rahim al-Hussaini Aga Khan V ascended as the 50th hereditary Imam of the Shia Nizari Ismaili Muslims on 4 February 2025, following the passing of his father, His Late Highness Prince Karim al-Hussaini Aga Khan IV, (aged 88). He guides an estimated 12-15 million followers across 25 countries, from Central Asia to East Africa, Europe, and North America. He is also steward of the $13 billion Aga Khan Development Network (AKDN) founded by his father in 1967. The AKDN is a collection of over 200 development and humanitarian agencies that work to improve the lives of people in over 30 countries. The network is widely known for its architectural and cultural work, including projects that revitalise historic cities. Some projects include the renovation of the Old City of Aleppo and the Al-Azhar Park in Cairo. The Aga Khan’s foundation maintains a strong and enduring presence in developing countries: building health care capacity, promoting economic development in rural areas, and helping improve educational opportunities.