The Reincarnate (Le sacrifice d'une vierge) (1971)

A wealthy lawyer with a short time to live hides a secret--he is the continuation of a line of "reincarnates", and his memory is an accumulation of their memories. He must find a successor to whom he can pass on his memories, and he meets a struggling but ambitious artist who seems to be a likely candidate for the "reincarnation" ritual, which involves sacrificing a virgin.