The first historical and printed reference to Mary Magdalene's mythical journey to France was by Sigebert of Gembloux, c.1030-1112, in his Chronicon ab anno 381 ad 1113 , entry for AD 745. But he did not reference Mary Magdalene being married with Jesus' child.

The Holy Blood and the Holy Grail, in one of its multitudinous factual inaccuracies, wrongly referred to unspecified traditions about the Magdalene fleeing to Marseilles in legends “as early as the fourth century” (on page 248, first edition), but the earliest written form of this tradition is just before 856 (footnote 16 on pages 432-433, first edition), making reference to Rabanus (776-856) – not realising the terrible mistake that this should have been to Pseudo-Rabanus Maurus. This text is not the earliest extant version, but only that found in Magdalen College, University of Oxford, dating from the 15th Century.

An early tradition of Mary Magdalene’s place of burial, predating being buried in France, was in Ephesus, given by Gregory of Tours (c.538-594) and a slightly different tradition by Willibald Modestus of Jerusalem (died 630).

The remains of Mary Magdalene were transferred from Ephesus in 899 to Constantinople, but later perished when Constantinople was sacked in 1204.

Quoting from one expert on this subject matter: “In the ninth century, the [Byzantine] Emperor [Flavius] Leo the Philosopher [Leo VI The Wise] translated the relics of the Magdalen at Ephesus to Constantinople. Saxer believes these may be the same relics that Conrad of Krosik, bishop of Haberstadt (1201-1209) brought from the East after the crusaders sacked Constantinople. They were enshrined in the Church of St. John of the Lateran in Rome” [Victor Saxer, Le culte de Marie Madeleine en Occident des origines à la fin du moyen-âge, Volume II, pages 218-219, 241, Auxerre-Paris, 1959].

These are the reasons why no archaeological society will ever take The Holy Blood and the Holy Grail seriously and why it will always be considered a nut book. Those people who accept The Holy Blood and the Holy Grail will never be taken seriously.

Let's accept the madness: even if it could be proved that Jesus Christ was married to Mary Magdalene, that their children intermarried with the Royal Families of Europe, it would be superfluous nonsense because France is a secular society and the country rejects all form of Royalty. France would have no interest at all and that includes the Grand Orient of France that is also secular and it keeps an eye on French politics.

It's also nonsensical to use Robert M. Price to further the Jesus bloodline argument because he considers Jesus Christ to be mythical and has rubbished the idea of The Da Vinci Code in his books such as The Da Vinci Fraud: Why The Truth Is Stranger Than Fiction (2005), Jesus Is Dead (2007) and Secret Scrolls: Revelations From The Lost Gospel Novels (2010).