 It returned to Longchamp in 1946, and its regular distance was extended to 3,100 metres in 1955.The Prix Jean Prat for older horses was renamed the Prix Vicomtesse Vigier in 1985.This was in honour of Vicomtesse Vigier, Madeleine Double de Saint-Lambert (1869–1970), the niece of Jean Prat, who inherited her uncle's stable upon his death.