Flintshire is a British-bred Thoroughbred racehorse who has been trained in France and the United States. Unraced as a juvenile, he was one of the best three-year-old colts in France in 2013, winning the Prix du Lys and the Grand Prix de Paris. In 2014 he finished second in the Prix de l'Arc de Triomphe and the Breeders' Cup Turf before recording his biggest win in the Hong Kong Vase. As five-year-old he won the Sword Dancer Invitational Handicap and again finished second in the Arc. At the start of his six-year-old season in 2016 he was sent to be trained in the United States. He began the season with victories in the Manhattan Handicap, Bowling Green Handicap and Sword Dancer Stakes, before finishing second in his last two starts, the Joe Hirsch Turf Classic and Breeders' Cup Turf.

The Grand Prix de Paris is a Group 1 flat horse race in France open to three-year-old thoroughbred colts and fillies. It is run at Longchamp over a distance of 2,400 metres, and it is scheduled to take place each year in July.