Rudolf Steiner (1861-1925) was an Austrian philosopher, esotericist, and clairvoyant. He is considered one of the greatest and most influential spiritual masters of the twentieth century.Christianity as Mystical Fact, a Steiner's primitive and fundamental work, first published in 1902, intends to demonstrate how Christianity was born from what had been prepared in the pre-Christian Mysteries. This is a theory that is certainly questionable and refuted by many philosophers and intellectuals, including Arturo Reghini and Friedrich Nietzsche. However, this book constitutes the foundation of Rudolf Steiner's thought and of the theories that he will later develop more completely on the nature of Christ and Christianity.Christianity, in reality, was not simply a further and natural development of the wisdom and theological doctrines of the ancient mystery cults, but a completely new phenomenon, absolutely foreign to Western Tradition. A doctrine artfully crafted with the aim of social control and domination of consciences, destined to destroy the freedom and religious plurality that had characterized the civilizations of the Mediterranean and the Roman Empire for centuries.