Seventh Day

The Seventh Day is the final day of the narrative, encompassing the climactic confrontation between William of Baskerville and Jorge of Burgos in the secret room of the library known as the finis Africae, the destruction of the library by fire, and the philosophical aftermath in which William reflects on the nature of truth and order. It is the day on which the mystery of the murders is fully revealed, the forbidden book—Aristotle's lost second book of the Poetics—is destroyed, and the abbey's great library, the greatest in Christendom, is consumed by flames, marking the end of an era and the triumph of a grim, apocalyptic vision over the spirit of inquiry.

Confrontation in the Finis Africae

William and Adso, having finally deciphered the secret of the mirror room, enter the finis Africae, the hidden heptagonal chamber at the heart of the library. There they find Jorge of Burgos, the blind, ancient monk, seated behind a table, waiting for them. Jorge confesses that he has been the mastermind behind the library's defenses for forty years, manipulating the abbot and the librarians to keep the library's most dangerous secrets hidden. He admits to luring Abbot Abo into a secret passage and killing him by breaking the mechanism that controls the entrance, trapping him to suffocate. Jorge reveals that he poisoned the pages of the forbidden book—Aristotle's lost second book of the Poetics, which deals with comedy and laughter—with a lethal substance stolen years ago from Severinus's infirmary. He explains that Venantius, Berengar, and Malachi all died from touching or ingesting the poison while reading the book. Jorge defends his actions as a holy duty to protect the Christian world from a work that, he believes, would legitimize laughter and mockery, thereby undermining the fear of God and the authority of the church. He argues that the book could teach men to laugh at the Incarnation and to cancel fear, which would destroy the foundation of faith and order.

The Destruction of the Book and the Fire

As William confronts him, Jorge begins to tear the pages from the manuscript and devour them, determined to consume the book entirely so that its knowledge will be lost forever. In the ensuing struggle, Jorge knocks over the lamp, and the oil spills onto a pile of parchments, igniting a fire. The flames spread rapidly through the dry, ancient pages and the labyrinthine rooms of the library. Jorge, now poisoned by the book he has eaten, throws the remaining pages of the Aristotle into the fire. William and Adso, realizing they cannot save the library, flee the Aedificium. The fire, fanned by a strong wind, quickly consumes the entire abbey—the church, the stables, the dormitories—reducing the greatest library in Christendom to ashes. The monks and servants flee in chaos, and the abbey is abandoned as a place accursed.

Aftermath and William's Reflection

In the days following the fire, William and Adso leave the ruined abbey. As they travel, they receive news of the Emperor Louis's failing fortunes and the collapse of the imperial cause in Italy. William, in a moment of profound philosophical reflection, tells Adso that he has discovered no grand, coherent plan behind the murders. He realizes that each crime was committed by a different person or by no one, and that the apocalyptic pattern he had imagined was a false construct. He concludes that the order the mind imagines is like a net or a ladder, useful for attaining something but ultimately meaningless and to be thrown away. He questions whether any universal order exists, given God's absolute freedom and omnipotence, and suggests that the only truth lies in learning to free oneself from the insane passion for truth. Adso, years later, returns to the site of the abbey and finds only ruins, ivy, and scraps of parchment. He collects the fragments, but is unable to discern any hidden meaning in them, and ends his manuscript with the famous line: "Stat rosa pristina nomine, nomina nuda tenemus."