Fulcanelli

The last alchemist. His student swore he met him decades later — younger.

Fulcanelli: pseudonymous author of 'Le Mystère des Cathédrales' (1926), which read Gothic cathedrals as alchemical texts in stone. His student Eugène Canseliet claimed the master achieved the Stone and later met him, unaged, decades after his disappearance. Documented: the books exist and their erudition is real; the man has never been identified despite a century of candidates (Champagne, Dujols). Bonus lore: physicist Jacques Bergier claimed a 1937 warning from Fulcanelli about nuclear weapons. An author-shaped hole that the occult filled with immortality.