Tributes have been paid to Nashwan, who has died at Shadwell Stud, aged 16.
The son of Blushing Groom out of brilliant broodmare Height Of Fashion was humanely destroyed at the stud due to complications suffered following what was expected to be a minor operation on his right hind leg.
The Hamdan Al Maktoum-owned colt won the General Accident 2000 Guineas on his seasonal debut in 1989 and followed up with the Ever Ready Derby, Coral-Eclipse and King George VI And Queen Elizabeth Diamond Stakes in a memorable season.
Nashwan also went on to prove himself a top performer at stud.
Among his offspring have been dual King George winner Swain, and Juddmonte International heroine One So Wonderful.
The loss of Nashwan is a second severe blow to Shadwell Stud, who earlier this year lost his half-brother Unfuwain.
In a statement, stud director Richard Lancaster said: "Everyone at Shadwell is absolutely stunned by the loss of this great horse and the thoroughbred world has lost in Nashwan and Unfuwain two wonderful contributors to the breed in a very short space of time."
Nashwan was ridden in all his seven starts by Willie Carson, and a close ally of his trainer Major Dick Hern, who himself sadly passed away recently, during that time was Marcus Tregoning.
And he remembers fondly Nashwan as the horse that saved the then wheelchair-bound Hern's career and as being largely responsible for the flourishing nature of his own career as one of the country's leading trainers.
Tregoning himself handles Nashwan's half-brother Nayef, winner of the Dubai Champion Stakes last season, and he said: "It's a sad day for us and everybody else connected with him."