Paris - Italian art historians are having none of it of course despite an avalanche of evidence coming from Paris.
But the quest to locate the last resting place of Lisa Gherardini Del Giocondo suddenly shifted this week from the Ursuline Convent in Florence, Italy to France's premier cathedral of Notre Dame de Paris.
Reports from the French capital say ancient documents smuggled out of the Vatican during World War I have describe how a secret sepulchre, hidden deep beneath the altar of the Gothic French masterpiece, is the site of her suspected tomb.
Remains of the Florentine beauty immortalised in Da Vinci's Mona Lisa vanished from Italy soon after her death in 1542.
Some evidence from records sourced to Queen Madeleine of France, wife of King James V of Scotland, also point to codicils in Leonardo's Last Will And Testament providing for Lisa.
Some of that bequest may have been used to remove her remains from Florence's Santissima Annunziata Church for safe burial in perpetuity in France's awesome Notre Dame.
Curators of the Da Vinci Trust which guards the great master's intellectual property have previously commented that Lisa's entombed body became the subject of reported mass Huguenot rioting in 1548.
Gangs of marauding dissenters trashed much of Notre Dame's interior in a frenzied search for 'idolatrous' female remains.
This week specialised high tech sonar equipment will be used by Da Vinci historians to begin the painstaking task of mapping out the location of the alleged secret burial chamber.
Some clues have been provided by decrypted sacred geometry codes discovered in the Pyrenean church of St Mary Magdalene in Rennes-Le-Chateau, Aude Department.
The 17th century folly is notorious for its bizarre Illuminati symbols and Priory of Sion claims that Jesus and his wife are buried nearby.
Last year a fragment of 16th century parchment, discovered inside an early 15th century Bible, contained what Da Vinci sleuths say is the final jigsaw puzzle piece for locating the lovely Lisa's grave.
The Italians are naturally livid.