Galileo, the world’s most sought-after jockey, has died at the age of 23.
The horse won the 2001 Derby in Epsom, and was the father of many champions including the legendary Frankel.
Colmore Stade’s owners announced that he had been put to sleep “for humanitarian reasons due to a chronic, unresponsive and debilitating injury to the left front foot”.
“It’s a very sad day,” said John Magnier, owner of Coolmore.
“We all feel incredibly lucky to have Galileo here at Coolmore.
“His influence on the dynasty through his sons and daughters will be a lasting legacy and his tremendous success is truly unprecedented.”
The most successful Group 1 mole ever produced 91 Group 1 singles winners, while 20 of his sons have produced Group 1 winners on Flat.
Frank Q, BBC Sport
Galileo was the largest stud in the world – a stallion so valuable that his breeding fee has not been announced, but it is believed to be more than £300,000 at a time.
His fortune is said to be over £150m, he was really a father.
In addition to winning the derby himself, he was the father of five subsequent winners of the famous Epsom race – New Approach, Australia, world umpire, Anthony Van Dyck and Serpentine.
His trainer Aidan O’Brien described him as an “incredible” horse and said the race would probably never see such an “amazing story” again.