If the 0 Meridien has to be marked by a tomb and not any tomb, then that tomb could have been in the Pyrenees.

It seems the conflict between geographers had something to do with the Pyrenees. As Louis's the XIVth had decreed that the "The Pyrenees no longer exist!". 

Officially said in context of;

War of the Spanish Succession (1701-1714)

- Charles II of Spain (Spanish Habsburg) died without an heir
- before Charles' death, France and Austria signed a treaty to equally divide Spain
- Charles II named Philip of Anjou, grandson of Louis XIV, heir in his will
- Louis then ignored the treaty in favor of his grandson
- "The Pyrenees no longer exist"
- England Holland, Prussia, and Austria allied against France, Spain, and Bavaria
- Battle of Gibraltar
- Battle of Blenheim
- Treaty of Utrecht ends the war

If the 0 Meridien has to be marked by a tomb and not any tomb, then that tomb could have been in the Pyrenees.

? Related to the famous tomb of Rennes-les-Bains