Prix Jean Prat metres. For a period it was held in April, and it served as a trial for the Prix du Jockey Club. Both Prix Biennal races were renamed the Prix Jean Prat in 1940. This was in memory of Jean Prat (1847–1940), a successful racehorse owner and breeder. The version for three-year-olds was switched to late May or early June in 1961. It was shortened to 1,850 metres in 1962. It was transferred to Chantilly and cut to 1,800 metres in 1967. The present system of race grading was introduced in 1971, and for several years the event held Group 2
Prix Lupin The race was one of several trials for the Prix du Jockey Club collectively known as the Poules des Produits. The others (listed by their modern titles) were the Prix Daru, the Prix Hocquart, the Prix Noailles and the Prix Greffulhe. Unlike those races, the Grande Poule des Produits had no restrictions based on the nationality of a horse's sire or dam. The event was renamed in memory of Auguste Lupin (1807–1895), a successful owner-breeder, in 1896. The Prix Lupin was abandoned throughout World War I, with no running from 1915 to 1918. It was cancelled once during World War