Ancient myths are not dead. Based on this premise the intent of this paper is to delineate the historical paths which legitimized the survival of the myth of the Sibyls in the Christian world in its close association with astrology, as an art form of persuasive power. Paganism has always been an intrinsic element of Christianity, not only symbolically, but also as a direct impact on people and their lives. Some particular moments in history are in this sense noteworthy, from the apologist priests of primitive Christianity to the birth of modern science. The sibyls and astrology, as “outside” witnesses, are a constant presence in Christian world, which is the focus of this paper. The afterlife (Naschleben) of the sibyls throughout history is further affirmed by the writings of the patristic and scholastic theologians, and also evidenced in the work of Albumasar, who associates sibyls, and their representation as power.