Who is Princess Zahra Aga Khan, the horse-loving friend of the Firm who joined Princess Beatrice in the royal procession at Ascot?

Zahra’s father, Prince Karim al-Husayni, the Aga Khan IV, passed away earlier this year at the age of 88. Revered not only as the 49th hereditary Imam of the world’s Shia Ismaili Muslims, but also as one of the most influential figures in high society, he was known for his close ties with the British monarchy. Over the…