Pedro Calderon de la Barca's mythological sacramental act is a drama genre in which the heroes of the Greek Roman mythology are transformed into Catholic saints to embody the mystery of Christ's Eucharist. The mythical figures, accepted by Calderon, were reborn as fresh heroines in the Catholic Religious Theater. It helped the audience in the 17th century to understand Catholic doctrine in a fresh and novel way. Combining the ideas of pagan classical myths with biblical stories, his Baroque sacramental acts acquired expressive power in response to the spirit of the Counter-Reformation. They say that Baroque is a fusion of medieval sky and Renaissance' land. Calderon's mythological sacramental acts appropriately show the essence of the fusion of these two disparate visions. In the 17th century Spanish Catholic literature, Calderon's works were examples of the resurrection of the two contrasting worlds: the ancient Greek pagan culture of the Aryans and the Jewish Christian tradition of the Semites. The metamorphosis of Greek mythology in his sacramental acts demonstrates not only a return to the tradition of the medieval church, but also a literary phenomenon that captures the culmination of Catholic Reformation literature.