Laurence Gardner is a writer and lecturer on historical revisionism. He has written many books on alternative history.
Gardner is occasionally styled "Chevalier Labhran de Saint Germain", "Presidential Attache to the European Council of Princes" and "Prior of the Celtic Churches Sacred Kindred of Saint Columbia" . He also claims to be Jacobite Historiographer Royal of the Royal House of Stewart. He is a supporter of Michael Lafosse, in particular his claims to be descended from the House of Stuart, which Gardner claims was descended from Jesus Christ.
Historians point out that he is a conspiracy theorist; implying that his work is pseudohistory, poorly researched and not scholarly, particularly The Bloodline of the Holy Grail. Evidence for this criticism comes particularly from his mistranslation of the Gnostic Gospel written by Phillip, which he uses to motivate the theory that Jesus and Mary Magdalene were married and produced a child whose bloodline is the Stuart clan of Scotland.
In developing this theory in The Bloodline of the Holy Grail, Gardner depends on the alleged fact that Jesus kissed Mary Magdalene "often on the mouth" (Ch.5, p. 57 of paperback edition). In fact, reputable translations of the Gospel of Phillip, e.g. Wesley Isenberg in James M. Robinson (Editor), "The Nag Hammadi Library" (1988), declare the noun (mouth) to be undecipherable due to damage to the ancient manuscript. In any case, a kiss on the mouth between early Christian males was a sign of holy love and affection, as evidence by the Second Apocalyspe of James, in which James so kisses the priest Mareim.