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The Holy Grail and its miraculous contents have never been found. In the absence of any hard data, whatever happened at the Last Supper remains an article of faith for today’s 2.5 billion Christians. In an unprecedented search for real answers, The Immortality Key examines the archaic roots of the ritual that is performed every Sunday for nearly one third of the planet.

Before the rise of Christianity, the ancient Greeks found salvation in their own sacraments. Athens’ best and brightest flocked to the spiritual capital of Eleusis, where a holy beer unleashed heavenly visions for 2,000 years. Others drank the holy wine of Dionysus to become one with the god, achieving immortality. In the 1970s, renegade scholars claimed this beer and wine - the original sacraments of Western civilization - were spiked with mind-altering drugs. In recent years, vindication for the disgraced theory has been quietly mounting in the laboratory.

With an unquenchable thirst for evidence, Muraresku tours the ruins of Greece with its government archaeologists. He gains access to the hidden collections of the Louvre Museum to show the continuity between pagan and Christian wine. He unravels the ancient Greek of the New Testament with the world’s most controversial priest. He spelunks into the catacombs under the streets of Rome to decipher the lost symbols of Christianity’s oldest monuments.

The Immortality Key reconstructs a suppressed history of women consecrating the forbidden, drugged Eucharist that was later banned by the Church Fathers. Women who were later targeted as witches during the Inquisition, when Europe’s sacred pharmacology largely disappeared. If the scientists of today have resurrected this technology, then Christianity is dead. Unless it returns to its roots.