The 1343–1346 Collapse of the Bardi and Peruzzi and the Birth of Florence’s Monte Comune

Between October 1343 and the spring of 1346, the financial heart of medieval Europe suffered a systemic twin crisis that destroyed the continent’s largest private merchant-banking houses while giving birth to one of the Western world’s earliest negotiable sovereign bond markets. For nearly half a century, the Florentine “super-companies”—led by the Compagnia dei Bardi, the Compagnia dei Peruzzi, and the Compagnia degli Acciaiuoli—had dominated international trade and royal finance from London and Bruges to Naples, Avignon, Cyprus, and Rhodes. In his Nuova Cronica, the contemporary Florentine chronicler and former Peruzzi shareholder Giovanni Villani lamented their downfall as the shattering of “the pillar of Christendom,” famously recording that King Edward III of England owed the Bardi 900,000 gold florins and the Peruzzi 600,000 gold florins (1.5 million florins in Villani’s account, a figure later historians have challenged)—a sum Villani declared “worth a kingdom.” When severe strains surrounding Edward III’s wartime borrowing coincided with a panicked run by Angevin depositors in Naples and a collapse of Florentine communal credit after the disastrous War of Lucca, the Acciaiuoli and Peruzzi failed in 1343 and the Bardi followed into bankruptcy in 1346. Out of that same fiscal wreckage, on February 22, 1345, the Florentine Republic consolidated its mountain of unpayable forced war loans (prestanze) into Il Monte Comune: a permanent, central ledger of perpetual public debt paying 5 percent annual interest whose transferable shares (luoghi) soon traded briskly on a secondary market. ^[1]

Anatomy of the Florentine Super-Companies: Wool, Grain, and Unlimited Liability#

The great early fourteenth-century Florentine compagnie were neither simple deposit banks nor modern joint-stock corporations. As economic historians Armando Sapori and Edwin S. Hunt have demonstrated from surviving account books—including the Peruzzi ledgers (Libri segreti and Libri dell’asse) preserved in the Florentine archives—the Bardi, Peruzzi, and Acciaiuoli operated as vertically integrated commodity, manufacturing, and banking conglomerates structured as multi-year partnerships (corpo di compagnia). Family members and outside patrician equity partners contributed fixed share capital (the corpo), which was supplemented by vastly larger time deposits (depositi a discrezione or sopraccorpo) accepted from Florentine citizens, prelates, knights, and foreign nobles earning discretionary annual returns of 6 to 10 percent to circumvent ecclesiastical bans on formal usury. ^[2]

Critically, unlike the later fifteenth-century Medici Bank, each fourteenth-century super-company operated as a single monolithic legal partnership across all of Europe. Its foreign branches in London, Bruges, Paris, Avignon, Pisa, Venice, Naples, Palermo, Majorca, Tunis, Cyprus, and Rhodes were managed by salaried factors or junior partners rather than legally separate subsidiaries. Under Florentine statute and the law merchant, every partner in the compagnia bore joint and unlimited personal liability for the debts of the entire international network: a catastrophic loss in London or Naples directly threatened the palaces and rural estates of the partners in Florence.

The real engine of super-company profitability was monopolistic commodity trade tied to sovereign tax farming and papal revenue collection. In southern Italy, the Bardi, Peruzzi, and Acciaiuoli served as court bankers to the Angevin monarchs of the Kingdom of Naples (King Robert the Wise), advancing cash and military subsidies to the crown in exchange for customs franchises and export licenses over Apulian and Sicilian wheat, olive oil, and cheese. In northwestern Europe, the Bardi and Peruzzi served as fiscal agents to the Papacy and the English Crown, using royal export licenses and customs assignments to purchase prime raw English wool from Cistercian monasteries in Yorkshire and Lincolnshire, shipping the fleeces either to Flanders or back to Florence to feed the looms of the Arte della Lana.

Financing Edward III and the Sovereign Debt Trap in England (1336–1342)#

What turned this lucrative wool-and-banking nexus into a fatal trap was the escalating dependence of the Bardi and Peruzzi on sovereign lending to King Edward III of England. Already under Edward I and Edward II, earlier Italian banking houses—the Riccardi of Lucca in 1294 and the Frescobaldi of Florence in 1311—had been ruined when English monarchs defaulted on war advances secured against wool customs. By the late 1320s, the Bardi (who had operated in England since the 1290s) and the Peruzzi (who entered the English royal loan market aggressively in 1336 under company head Bonifazio di Tommaso Peruzzi) held hefty existing claims against the English Exchequer that could only be recovered if the king granted them continuing assignments on the royal wool customs (the magna et antiqua custuma). ^[3]

When Edward III launched his bid for the French throne in 1336–1337, igniting the Hundred Years’ War, he constructed an expensive anti-French coalition of Low Countries and German princes requiring vast gold remittances on the Continent. To induce the Bardi and Peruzzi to act as his continental paymasters, Edward III imposed an embargo on wool exports to Flanders, established a royal wool monopoly, and pledged tens of thousands of sacks of English wool alongside future parliamentary tax subsidies and customs duties to the two Florentine firms. Between 1337 and 1340, the Bardi and Peruzzi advanced immense sums in cash, armor, supplies, and bills of exchange in Antwerp, Koblenz, and London, even holding the Great Crown of England and the jewels of Queen Philippa as collateral. ^[4]

The military and commercial gamble collapsed almost immediately. Edward III’s continental campaigns of 1338–1340 bogged down without a decisive victory, while royal purveyors failed to deliver the promised 30,000 sacks of wool, and several shipments that did reach Brabant were seized or sold at heavy losses. In late November 1340, a furious and bankrupt Edward III returned unexpectedly to the Tower of London, purged his ministers, suspended royal debt assignments to foreign financiers, and temporarily imprisoned leading factors of the Bardi and Peruzzi while auditing their accounts. ^[5]

In his chronicle, Giovanni Villani—whose brother Filippo had managed the Peruzzi branch in Avignon and who himself lost his personal fortune in the crash—claimed that Edward III owed 900,000 gold florins to the Bardi and 600,000 gold florins to the Peruzzi (1.5 million florins in total according to Villani, whose figures are disputed). Historian Edwin S. Hunt’s work on the surviving accounts challenges both the reported size of the royal debts and the claim that English default alone caused the failures. Royal borrowing and disputed repayments strained the firms, but the companies also faced risks in their other lending and trading operations, including in the Kingdom of Naples, while fiscal and political instability damaged credit in Florence. ^[6]

The 1341–1343 Contagion: Naples Bank Runs, the Lucca War, and Super-Company Failure#

Despite the freeze on their English assets, the Bardi, Peruzzi, and Acciaiuoli struggled to keep their doors open between 1340 and 1342 by relying on short-term rollover credit and their profitable grain franchise in the Kingdom of Naples. What triggered their final liquidation was a violent three-way shock uniting geopolitics in Italy, a sovereign crisis in Florence, and a classic depositor run in Naples. ^[7]

Between 1341 and 1342, the Republic of Florence fought a ruinously expensive and unsuccessful war against Pisa for control of the city of Lucca. To fund mercenary armies, the Florentine commune levied hundreds of thousands of florins in compulsory forced loans (prestanze) upon its wealthiest banking families while diverting customs revenues (gabelle) that had previously been pledged to repay existing communal creditors. When Lucca fell to Pisa in July 1342, Florence’s patrician oligarchy invited the French-Angevin nobleman Walter VI of Brienne, Duke of Athens, to assume emergency command as Signore of the city. Attempting to win popular support and stave off municipal bankruptcy, the Duke of Athens suspended the repayment of communal tax assignments to the banking magnates, stripping the Bardi, Peruzzi, and Acciaiuoli of vital domestic cash flows. ^[8]

At the same moment, Florence’s diplomatic pivot toward Emperor Louis IV the Bavarian during the Lucca crisis infuriated Pope Clement VI in Avignon and King Robert of Naples, Florence’s traditional Guelph protectors. Fearing that the Florentine commune and its merchant banks were insolvent—and incited by political hostility—Neapolitan barons, prelates, and royal officials staged a massive, coordinated bank run on the Naples branches of the Bardi, Peruzzi, and Acciaiuoli in 1341–1342, demanding the immediate withdrawal of their gold deposits. Because those deposits had been locked up in grain advances and illiquid loans to northern monarchs, the southern branches ran out of cash.

After the Bardi and Peruzzi helped overthrow the tyranny of the Duke of Athens in July 1343, the newly restored popular government in Florence could no longer shield the insolvent banking houses from their domestic and foreign creditors. In October 1343, the Peruzzi and the Acciaiuoli formally declared bankruptcy. The Bardi, who briefly attempted a desperate oligarchic coup in September 1343 during which their palaces in the Oltrarno were sacked and burned by angry citizens, limped on under a moratorium before collapsing into official bankruptcy in early 1346. Special municipal bankruptcy syndics spent years seizing and liquidating the urban palaces, country villas, and commercial receivables of the partners: Peruzzi creditors eventually recovered roughly 35.8 percent of their claims (7 soldi, 2 denari per lira), while Bardi creditors received approximately 46.25 percent (9 soldi, 3 denari per lira) in heavily discounted communal debt claims and land.

February 1345: From Chaotic Prestanze to the Permanent Monte Comune#

The collapse of Florence’s private super-companies unfolded in lockstep with a revolutionary overhaul of the Republic’s own sovereign debt. Throughout the early 1300s, whenever military campaigns outstripped regular indirect tax receipts from city gate tolls, salt taxes, and wine excises (the gabelle), Florence had raised war funds through prestanze—mandatory forced loans assessed on citizen households according to municipal tax rolls (estimo). Initially, each prestanza was treated as a temporary floating debt secured by a specific gabella, paying 8 to 15 percent annual interest until the principal was repaid within a few years.

By the autumn of 1343, however, decades of wars against Castruccio Castracani, Mastino della Scala of Verona, and Pisa over Lucca had left the Florentine treasury buried under more than 500,000 to 600,000 gold florins of unpaid, overlapping prestanze. Because almost all municipal gabelle were already mortgaged years in advance and the banking crash had wiped out tax collections, the Commune faced outright sovereign default against its own citizen-creditors.

Rather than repudiating its obligations—which would have ruined the very merchant guild elite that governed the Republic—the Florentine Councils enacted a sweeping debt restructuring between December 1343 and February 1345. In late December 1343, the government appointed officials to audit every outstanding prestanza and transcribe the verified claims of thousands of citizens into massive central parchment registers, metaphorically christened Il Monte (“the Mountain” of debt). Then, by a landmark statute enacted on February 22, 1345 (1344 in the Florentine Annunciation calendar), the Republic formally established the Monte Comune:

• Conversion into Perpetual Funded Debt: All verified communal obligations and forced loans were consolidated into a single permanent public debt fund. The Commune suspended any fixed timetable for repaying the principal—effectively converting short-term forced loans into perpetual government annuities—while reserving the right to redeem shares whenever fiscal surpluses allowed.
• Standardized 5% Coupon (Paghe): In exchange for giving up near-term principal repayment and higher wartime interest rates, every creditor registered in the Monte Comune was guaranteed a uniform, perpetual annual return of 5 percent (one soldo per lira, or 5 florins per 100 florins of face value), paid in monthly or quarterly installments (paghe) secured directly by a dedicated pool of communal gabelle revenues.
• Legal Negotiability and Secondary Market Trading: Most crucially, reforms enacted between February and August 1345 granted registered bondholders complete freedom to sell, bequeath, pledge as collateral, or transfer their Monte credits (luoghi di Monte) to any other Florentine citizen simply by recording the transfer in the ledgers of the Monte scribes upon payment of a modest transfer tax.

The Secondary Bond Market and the Legacy of the 1340s Crisis#

By transforming illiquid tax receipts into standardized, legally transferable book-entry claims, the 1345 Monte Comune statutes immediately sparked a vibrant secondary market for sovereign debt in the heart of Florence. Because citizens forced to pay new war prestanze often needed immediate cash to run their wool workshops or pay taxes, they sold their newly inscribed Monte claims to wealthy liquid investors, widows’ trusts, and merchant partnerships. Market prices for 100 florins of nominal Monte Comune par value fluctuated dynamically in response to military news, interest-payment punctuality, and money-market liquidity—trading between 25 and 30 florins during war panics and rising to 60 or 70 florins during periods of peace (yielding a true cash return of 7 to 16 percent to secondary-market buyers who collected the 5-florin annual coupon on a 30- to 70-florin purchase price).

The dual crisis of 1343–1346 permanently reshaped European financial architecture. In the private sector, the destruction of the monolithic Bardi, Peruzzi, and Acciaiuoli super-companies taught Italian financiers the lethal danger of concentration risk in sovereign war loans and unlimited cross-branch liability—a lesson that directly inspired the fragmented holding-partnership structure adopted by the Datini and Medici banks half a century later. In the public sector, the creation of the Monte Comune proved that a commercial republic could survive a catastrophic banking crash by turning its citizens’ forced war loans into liquid, income-bearing capital assets, establishing a template for funded national debt that would later echo in Amsterdam, London, and modern bond markets.

Theoretical & Balance-Sheet Transmission Mechanism#

In the Kindleberger–Minsky taxonomy of financial instability (Kindleberger, 1978; Minsky, 1986) and Irving Fisher’s (1933) debt-deflation framework, speculative asset booms become systemic crises when credit expansion shifts balance sheets from hedge finance (cash flows covering principal and interest) to speculative and Ponzi finance (relying on rising asset prices and short-term margin roll-overs).

Once monetary tightening or an exogenous shock halts price appreciation, forced margin liquidations trigger Fisherian debt-deflation: fire-sale asset discounts erode bank collateral values, contracting credit supply across the real economy.

Sources and Further Reading

1. Edwin S. Hunt, “ Introduction: The Medieval Super-Companies: A Study of the Peruzzi Company of Florence,” Cambridge University Press, 1994. Peer-Reviewed / Academic Research
2. Edwin S. Hunt, “ A New Look at the Dealings of the Bardi and Peruzzi with Edward III,” The Journal of Economic History (Cambridge University Press / RePEc), 1990. Peer-Reviewed / Academic Research
3. John H. Munro, “ The Medieval Origins of the Financial Revolution: Usury, Rentes, and Negotiability,” University of Toronto, 2003. Historical & Financial Reference
4. Armando Sapori, “ Monte (Il Monte Comune di Firenze),” Enciclopedia Italiana (Istituto della Enciclopedia Italiana Treccani), 1934. Historical & Financial Reference
5. Armando Sapori, “ Bardi,” Enciclopedia Italiana (Istituto della Enciclopedia Italiana Treccani), 1930. Historical & Financial Reference
6. Armando Sapori, “ Peruzzi,” Enciclopedia Italiana (Istituto della Enciclopedia Italiana Treccani), 1935. Historical & Financial Reference
7. Irving Fisher — "The Debt-Deflation Theory of Great Depressions," Econometrica 1, no. 4 (FRASER Federal Reserve Archive, 1933): 337–357 Central Bank / Monetary Authority
8. Charles P. Kindleberger & Robert Z. Aliber — Manias, Panics, and Crashes: A History of Financial Crises (Palgrave Macmillan) Peer-Reviewed / Academic Research

Have an idea for another financial history documentary or article? Request a story →