With the passing of racehorse owner, religious leader and businessman Aga Khan at the age of 88 in Portugal on February 4, horseracing fans will remember him for his passion for the sport, but also for an enduring mystery – the disappearance of his top young colt Shergar at the height of its fame and glory on the racetrack.

Shergar (Great Nephew GB) x Sharmeen (FR)) was a superstar who won the Epsom Derby by 10 lengths in 1981, and went on to be victorious in the Irish Derby and the King George Stakes. He was retired at the end of that racing season, with owners forking over £10m for shares in his stud fees. It was estimated the horse was worth $13.5 million at the time.

A portrait of an older man.

The Aga Khan in 2014. (Patrick Tsui/FCO photo)

The Aga Khan, whose philanthropy extended to Canada where he founded the Aga Khan Museum in North York, Ontario, was a billionaire who owned the Ballymany Stud in County Kildare, Ireland where Shergar was stabled. On the night of February 8, 1983, a gang of thugs armed with guns broke into the stud farm and stole Shergar.

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