Prix de Royaumont introduced in 1978, and the race was moved to a date earlier than that of the Prix de Diane. The event was staged at Longchamp from 1987 to 1990, and it was transferred to Saint-Cloud in 1991. Its distance was extended to 2,400 metres in 1992, and it continued to take place at Saint-Cloud until 1996. The race's only subsequent departure from Chantilly was in 2001, when it was run at Saint-Cloud. The Prix de Royaumont is now held on the same day as the Prix du Jockey Club. Prix de Royaumont The Prix de Royaumont is a Group 3
Prix du Muguet was introduced in 1967. It was contested over 2,000 metres at Longchamp in 1968. The race was not run in 1971, and it resumed with Group 3 status in 1972. It was absent again in 1974, and for a period thereafter it was sometimes staged at Longchamp (1976–77, 1982–83 and 1985). The Prix du Muguet was promoted to Group 2 level in 1995. Most successful horse (2 wins): Leading jockey (4 wins): Leading trainer (6 wins): Leading owner (3 wins): Prix du Muguet The Prix du Muguet is a Group 2 flat horse race in France open to thoroughbreds aged