Prix du Jockey Club initially 2,500 metres, and this was cut to 2,400 metres in 1843. It was switched to Versailles during the Revolution of 1848, and it was cancelled due to the Franco-Prussian War in 1871. The race was abandoned in 1915, and for three years thereafter it was replaced by the Prix des Trois Ans. This took place at Moulins in 1916, Chantilly in 1917 and Maisons-Laffitte in 1918. The first two runnings after World War I were held at Longchamp. A substitute race called the Prix de Chantilly was run at Auteuil over 2,600 metres in 1940. The Prix du Jockey
Prix Daru Viscount Paul Daru, who served as president of the Société d'Encouragement, in 1877. The Prix Daru 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 Lupin, the Prix Hocquart, the Prix Noailles and the Prix Greffulhe. From 1885, the Prix Daru was restricted to horses whose dams were born outside France. The event was funded by entries submitted before a horse's birth, in the year of its conception. The race merged with the Prix Noailles during the 1940s. The combined event,