Book excerpt: One of the most challenging objections to the historicity of the New Testament documents and the uniqueness of first century Christianity is the accusation of wholesale borrowing from earlier pagan sources. Such accusations are common in the fields of comparative religion and mythology. Parallels have been drawn between the story of Jesus and various other religious leaders, heroes, and pagan dying and rising gods. Though these parallels are found in stories from various cultures going back several millennia before the Christian era, the most prevalent challenge has come from what have become known as the mystery religions or mystery cults. From among these numerous cults, one has presented the greatest challenge and most striking parallels. That is the cult of Mithras, or Mithraism. This book addresses the theory that early Christianity borrowed heavily from Mithraism, and it investigates ancient textual and archaeological evidence as it seeks to evaluate that claim.