Prix du Moulin de Longchamp (the "grande piste") in 1987. The race was rescheduled for mid-September in 2011. Most successful horse: Leading jockey (6 wins): Leading trainer (6 wins): Leading owner (4 wins): The 2016 and 2017 races took place at Chantilly while Longchamp was closed for redevelopment. Prix du Moulin de Longchamp The Prix du Moulin de Longchamp is a Group 1 flat horse race in France open to thoroughbred colts and fillies aged three years or older. It is run at Longchamp over a distance of 1,600 metres , and it is scheduled to take place each year in September. The event is
Prix du Prince d'Orange Prix du Prince d'Orange The Prix du Prince d'Orange is a Group 3 flat horse race in France open to three-year-old thoroughbreds. It is run at Longchamp over a distance of 2,000 metres (about 1¼ miles), and it is scheduled to take place each year in September. The event is named after William of Orange (1840–1879), the eldest son of William III of the Netherlands. The Prince became a member of the Jockey-Club de Paris in 1863, and took up racehorse ownership shortly before his death. The Prix du Prince d'Orange was established in 1882. It was originally open to