Libro del Chiodo

A Book with a Threatening Name

The Libro del Chiodo—the Book of the Nail—takes its name from the great iron spike that still projects from its rear wooden board. Both leather-covered boards apparently once carried such a nail. This extraordinary feature gives the massive parchment volume an almost intimidating presence, fitting for a book filled with judgments, banishments, and political proscriptions.

Compiled in the later fourteenth century, the codex comprises eighty leaves, or 160 pages. Written in an elegant Gothic chancery hand, it preserves documents dating from 1268 to 1379. Its formidable physical character and uncompromising contents make it one of the most striking witnesses to the political history of Florence.

The “Black Book” of Factional Conflict

Florence in the thirteenth and fourteenth centuries was shaped by fierce struggles between Guelphs and Ghibellines. Even after the papal-aligned Guelphs prevailed, conflict continued as the party divided into Black and White factions. Anyone associated with the defeated side could be declared a rebel and excluded from the political community.

The book contains copies of the sentences against the White Guelphs in 1302, earlier lists of condemned Ghibellines from 1268, and reforms and decrees extending beyond the Ciompi uprising of 1378. Fines, confiscations, demolition of houses, disqualification from office, exile, and threats of death reveal how closely justice was intertwined with factional rule. Names and sentences form a disturbing gallery of those whom Florence chose to define as enemies.

The Two Judgments against Dante

The codex owes its greatest fame to the two sentences pronounced against Dante Alighieri. On 27 January 1302, the former prior was condemned in absentia on accusations including abuse of office and illicit gain. He was ordered to pay a heavy fine, banished for two years, and permanently barred from holding public office.

Dante did not appear before the court or comply with the order. A second and harsher judgment followed on 10 March: if he ever again came within the power of the Commune of Florence, he was to be burned to death. In a few official lines, the exile from which the poet would never return was made permanent. The Libro del Chiodo thus preserves the legal background to one of the most consequential banishments in literary history.

Copies That Outlived the Originals

The judgments entered in the manuscript are not the original instruments issued by the court but carefully prepared copies. That very circumstance gives them exceptional value. The original records of Dante’s condemnation were once kept in the archive of the communal chamber, but they were destroyed by fire in 1343 during the upheaval surrounding the expulsion of the Duke of Athens.

What might have seemed a secondary register became the essential vehicle of transmission. Its wording allows the accusations, penalties, and political language of the period to be followed in remarkable detail. The compilation also demonstrates how the Guelph Party justified its authority and organized the memory of its opponents.

Law, Power, and the Memory of Florence

The Libro del Chiodo is far more than a document concerning Dante. Across more than a century, it records how the Commune and the Guelph Party defined belonging, stigmatized opponents, and withdrew civic rights. Behind its formal language stand ruined careers, confiscated fortunes, demolished homes, and families driven from their city.

The volume also possesses extraordinary symbolic force. The projecting nail, heavy parchment, and relentless sequences of names make political exclusion almost physically tangible. It is at once a legal register, an instrument of power, and a unique monument to the conflicts of republican Florence.