Biblical conspiracy theory
Biblical conspiracy theories posit that much of what is believed about the Bible is a deception created to suppress a secret or ancient truth. Such conspiracy theories may claim that Jesus actually had a wife and children, or that a group such as the Priory of Sion has secret information about the true descendants of Jesus; some claim that there was a secret movement to censor books that truly belonged in the Bible, etc.
Source: Wikipedia — Biblical conspiracy theory (CC BY-SA 4.0)