Generous, who took the racing world by storm in 1991, has died at the age of 25.
The Paul Cole-trained colt had a fabulous three-year-old campaign, winning the Derby by five lengths, the Irish Derby by three lengths and the King George VI and Queen Elizabeth Stakes by seven lengths.
He stood at Alfred Buller's Scarvagh House Stud in Northern Ireland for over eight years.
Buller said in a statement: "He was unbelievably intelligent for a horse, kind and truly regal. He will be sadly missed and, to all involved with him, it has been a privilege to have cared for him and looked after him during his last period of life."
Owned by Prince Fahd Salman, the son of Caerleon was ridden to his three major three-year-old victories by Alan Munro, but the partnership ended in defeat in the Prix de l'Arc de Triomphe that October.
Generous was also a top juvenile, springing a 50-1 surprise in the Dewhurst Stakes at Newmarket in October 1990 under Richard Quinn before finishing fourth in the 2000 Guineas on his seasonal return.
Buller said: "He was a special horse. You have never seen a kinder and more likeable animal. He got fan mail and Christmas cards, even up to this year, and the guy who looked after all his fan mail used to send out wee bits of hair from his tail in a plaque as a souvenir.
"There are other stallions, all of whom were champions in their own way, but there was only one Generous."
Munro said: "I'm very saddened by the news. He was a very good horse."
21 October 2014Connell turns to Heskin
Integral to race on next year
Meade maps out gameplan for stars
Pele poised to tackle Hennessy
O'Neill sure of Taquin redemption
Heron seeking Great prize
Court to go on Trial
Saviour blow for Skelton
Dan makes chase debut
Moore waits on Grugy decision
O'Neill outlines That choices
Conn possible for Auction bid
Power team weigh up options
Bangor cancel schooling card
No rushing back for Long Run
Dynaste leads Old Roan contenders
Grands Crus retired
Exciting Berlais heads to Chepstow
Force handed Hong Kong mission
Park favourite for Trophy hunt
Al Kazeem team eye Hong Kong trip
Commemorative bound for Breeders'
Slade eyeing victorious swansong
20 October 2014Chelmsford City handed 58 fixtures
Alderwood to take two-mile test
Dynaste leads Old Roan contenders
Hennessy aim for Clouds
Fiesolana on Breeders' trail
High-class possibilities for Trophy
Chelmsford City handed 57 fixtures
French option for Maarek
Billy back for chasing bow
Judge to bid for Breeders' glory
Pipe mulls Moon target
High hopes for Holywell
Judge in Breeders' frame
Hill stars for Stoute and Moore
Gabriel lifts Garnet for Deegan
New One back with a win
Light career hangs in balance
Stars shines on hurdling debut
King big guns ready to start
Tullius camp consider options
Doyle unlikely to appeal Ascot ban
Mullins prepares formidable team
19 October 2014New One breezes to victory
Lavelle has Becher plan for Lodge
Riches heading on road north
Down Royal plan for Tiger
New makes Kempton return
Panther hunting Canadian prize
Sun takes a shine to Cork
Hobbs upholds Showcase record
Another gold strike for Bronze
Gallant Noble a true Champion
Head turns on Charm in QEII
Madame is Ascot leading lady
Forgotten rules for Weld
Byron is poetry in motion
18 October 2014Forgotten rules for Weld
War misses Breeders' date
Rakti reaps Caulfield reward
Chatez bids for Balmoral crown
Lavelle duo top Cheltenham card
Integral takes on the boys
Noble on Champion mission
Belardo a Dewhurst sparkler
Together stands firm for Ballydoyle
Ivawood felled by plucky Thought
Crowley doubles up on Berkshire
Tendon injury sidelines Tent