The Rise and Decline of the Medici Bank, 1397-1494
Buy on Amazon — The Rise and Decline of the Medici Bank, 1397-1494
Detailed overview
Raymond de Roover treats the Medici Bank as a working business organization rather than as a decorative background to Cosimo, Lorenzo, San Lorenzo, or the Biblioteca Laurenziana. The book begins with Italian merchant-bankers between the Crusades and the Great Discoveries, when Florence, Genoa, and Venice linked Levantine spices, English wool, Flemish cloth, papal remittances, and bills of exchange. De Roover repeatedly narrows large Renaissance claims into account-book questions: who supplied the capital, who bore unlimited liability, which branch held the cash, how long a bill took to mature, and why a manager in Bruges or Milan could endanger the whole concern.
The Medici Bank appears as an agglomeration of partnerships, accomandite, shops, and branches rather than as a single modern corporation. Giovanni di Bicci's move from Rome to Florence in 1397 is the formal beginning, but the ancestry runs through Messer Vieri di Cambio de' Medici, the Arte del Cambio, the Rome branch, and the Bardi partners Benedetto and Ilarione di Lippaccio. The libri segreti let de Roover reconstruct capital, profits, reserves, deposits a discrezione, and the rise of managers such as Giovanni d'Amerigo Benci, Folco Portinari, Lotto Tanini, and Francesco Sassetti. This gives the book its method: the Medici fortune is made visible through ledger categories, partnership clauses, catasto returns, letters of instruction, and balance sheets that expose both power and fragility.
The most important business line is not manufacturing but banking tied to exchange. De Roover shows why the usury doctrine made the cambium contract central: profit could be hidden in exchange rates, usance, rechange, distantia loci, and the risk of market movement. He explains the four parties to a bill of exchange, the difference between genuine, dry, and fictitious exchange, and the use of letters of credit for pilgrims, students, diplomats, and ecclesiastics. The same financial apparatus made the Medici useful to the Apostolic Chamber, since papal revenues flowed from England, Flanders, Burgundy, Scandinavia, Poland, and benefices beyond the Alps toward Rome or wherever the Curia had moved.
The book's narrative logic turns on the difference between Cosimo's discipline and the later relaxation of control. Under Cosimo and Giovanni Benci the bank expands through Geneva, Basel, Bruges, London, Venice, Rome, Milan, and textile shops while preserving reserves and using the holding-company-like parent partnership to supervise branch managers. After 1455 and especially after Cosimo's death in 1464, the same branch system becomes harder to command. Piero the Gouty tries retrenchment, but Francesco Sassetti lacks Benci's firmness, Giovanni Tornabuoni fights for the Rome branch, and the Portinari brothers in Milan and Bruges convert court access into enormous frozen credits.
The later chapters turn the success story into a study of balance-of-payments pressure and political banking. Milan depends on Francesco Sforza and then his heirs; London depends on Edward IV's wool licenses; Bruges is pulled into Charles the Bold, the toll of Gravelines, Burgundian galleys, the alum monopoly, and Tommaso Portinari's courtly ambitions; Lyons is damaged by Lionetto de' Rossi; Naples becomes entangled with Ferdinand of Aragon and the Apulian accomanda. De Roover does not let personality carry the whole explanation. He also emphasizes English wool shortages, the unfavorable balance of the Low Countries with Italy, papal remittances, the war between Venice and the Turks, debased silver, slender cash reserves, and the small equity base beneath large deposits.
The final picture is not a moral fable about Lorenzo the Magnificent being careless with money, although Lorenzo and Sassetti receive their share of blame. It is a reconstruction of a business type: the sedentary merchant-bankers who used branch networks, double-entry methods, secret ledgers, branch correspondence, and deposit certificates, yet drifted into the same government-finance trap that had ruined the Bardi, Peruzzi, Frescobaldi, and Acciaiuoli. By 1494 the Medici are expelled from Florence, the remaining Rome, Lyons, and Naples operations are gasping, and the Tornabuoni continuation lacks capital and credit. The bank's decline coincides with the collapse of Florentine international banking from seventy-two banchi grossi in 1422 to fewer than half a dozen by 1494.
Core concepts
Source links
Chapter-by-chapter notes
I - Introduction
Summary: De Roover opens with medieval Italy as the commercial hinge between the Levant and the North Sea, where Genoa, Pisa, Venice, and Florence handled spices, silkstuffs, cloth, wool, papal remittances, and bills of exchange. He places the Medici after the Bonsignori of Siena, the Gran Tavola, the Bardi, the Peruzzi, the Acciaiuoli, Edward III, Robert of Naples, the Alberti, the Pazzi, the Rucellai, and the Strozzi, so that 1397 becomes a precise institutional date rather than a family legend. The introduction also names the surviving sources: libri segreti covering March 26, 1397 to March 24, 1451, later correspondence after 1450, partnership agreements, balance sheets, bills, protests, deposit certificates, and a reorganization plan. De Roover frames the decline from Cosimo's death in 1464 through the Pazzi conspiracy of 1478 to the sequestration of Medici property in 1494, with poor management, branch autonomy, shrinking trade, and Northern transfer difficulties all already present. Source anchors: Gran Tavola; Edward III; March 26, 1397; libri segreti; Pazzi conspiracy; 1494 sequestration.
Analysis: The introduction matters because de Roover makes the Medici Bank legible through Gran Tavola, Edward III, and the libri segreti before he ever turns to Cosimo's patronage. March 26, 1397 fixes the inquiry in accounts rather than legend, while the Pazzi conspiracy and 1494 sequestration tell the reader that the book will test a rise-and-fall story against business records. The repeated comparison with Bardi, Peruzzi, Alberti, Pazzi, Rucellai, and Strozzi makes this a Commercial Society case: the Medici rise inside a Florentine order where credit, family reputation, public seizure, and international banking form one social system.
II - The Medici Bank and Its Institutional Background
Summary: This chapter explains the institutions that made Medici banking possible: the Church's usury doctrine, the cambium contract, the Arte del Cambio, the Florentine catasto, and the multi-currency bookkeeping of gold florins, fiorini di suggello, fiorini larghi, piccioli, pounds groat, ducats, imperiali, ecus, and cameral florins. De Roover shows how money-changers and merchant-bankers could avoid open interest by dealing in exchange, while San Antonino and stricter theologians remained suspicious of devices such as depositi a discrezione. The catasto material gives social and fiscal context: Cosimo's 1457 return lists Madonna Contessina, Piero, Giovanni, Pierfrancesco, fourteen family members, about fifty mouths to feed, 115,170 florins of taxable wealth, and the one-half percent rate before the progressive catasto of 1481. Monetary detail matters because the Medici books move among Florentine gold, petty silver, Flemish pounds groat, Venetian pounds groat, Milanese imperiali, Geneva ecus of 64 or 66 to the gold mark, Avignon fiorini pitetti, and papal fiorini di camera. Source anchors: usury doctrine; Arte del Cambio; catasto of 1457; fiorino largo; ecus of 64; fiorini di camera.
Analysis: The usury doctrine and Arte del Cambio explain why the Medici were bankers through exchange rather than modern lenders, and the catasto of 1457 shows that their business position translated directly into fiscal and social rank in Florence. The fiorino largo, ecus of 64, and fiorini di camera are not antiquarian decoration; they are the currencies that make branch accounts comparable, tax returns interpretable, and transfer profits or losses calculable. This is Legibility inside Financial Infrastructure: Cosimo's household, 115,170 florins, and the Florentine money system become governable because money, tax, and family status can be reduced to comparable records.
III - The Antecedents and the Early Years of the Medici Bank Under Giovanni di Bicci, 1397-1429
Summary: De Roover traces Giovanni di Bicci's bank back to Messer Vieri di Cambio de' Medici, whose firm enrolled in the Arte del Cambio, operated in Venice, Genoa, and Rome, and employed Giovanni and Francesco di Bicci before Giovanni struck out on his own. Giovanni's Rome partnership with Vieri became "Giovanni de' Medici e compagni in Roma" by 1393, and in 1397 he moved headquarters to Florence with Benedetto di Lippaccio de' Bardi and Gentile Buoni, beginning with 10,000 florins of capital that soon fell to 8,000 after Buoni's exit. The early bank experiments in Venice under Neri Tornaquinci and Giovanni di Francesco da Gagliano, in wool manufacturing under Cosimo's name, in Rome with papal funds, and in Naples and Gaeta alongside Jacopo Bartoli and Rosso de' Medici. The chapter also separates Giovanni's bank from Averardo di Francesco's rival Medici bank, whose Pisa and Spanish links, Rome branch under Andrea de' Bardi and Francesco Boscoli, and extinction in 1443 otherwise confuse the family story. Source anchors: Vieri di Cambio; Piccarda Bueri; Benedetto de' Bardi; 10,000 florins; Neri Tornaquinci; Averardo's bank.
Analysis: Vieri di Cambio, Benedetto de' Bardi, and Averardo's bank let de Roover replace a myth of sudden Medici genius with a genealogy of apprenticeship, partnership, and branch inheritance. The 10,000 florins and Neri Tornaquinci episode show how quickly capital structure and manager discipline mattered; bad credit to Germans in Venice already foreshadows later problems with distant branch autonomy. Piccarda Bueri's dowry and the Rome-to-Florence move make Giovanni's founding act a practical reallocation of funds from the Curia toward the Florentine money market.
IV - The Heyday of the Medici Bank: Cosimo at the Helm, 1429-1464
Summary: The death of Giovanni di Bicci in 1429 leaves Cosimo and Lorenzo di Giovanni in control of contracts already written in their names, with Ilarione di Lippaccio de' Bardi as general manager and Folco Portinari raising profits at the Tavola in Mercato Nuovo. De Roover follows the 1433 crisis around the failed Lucca war, Rinaldo degli Albizzi, Cosimo's exile in Venice, the movement of 3,000 ducats to San Miniato al Monte, 5,877 ducats to San Marco, 15,000 florins to Venice, and stock in the Monte Comune sold to Rome. After Cosimo's return, the 1435 reorganization replaces the Bardi connection with Antonio Salutati and Giovanni d'Amerigo Benci, raises capital from 24,000 to 32,000 and later 44,000 florins, and expands through Geneva, Basel, Ancona, Bruges, woolshops, and the silkshop. Benci's rise from Rome office boy to Geneva manager and then Cosimo's trusted general manager gives the chapter its administrative center. Source anchors: Cosimo's exile; San Miniato al Monte; 15,000 florins; Giovanni Benci; 44,000 florins; Basel office.
Analysis: Cosimo's exile, San Miniato al Monte, and the 15,000 florins moved to Venice show that political danger is handled through liquidity, custody, and branch balances rather than through rhetoric. Giovanni Benci and the 44,000 florins explain why the bank's heyday depends on Capital Allocation disciplined by a strong central office: Cosimo moves funds, chooses managers, and rewrites contracts after the Bardi exit instead of letting branch opportunity outrun control. The Basel office and Geneva profits show him exploiting church councils and fairs while still forcing the organization to account for results through the libri segreti.
V - The Legal Status and Economic Structure of the Medici Bank
Summary: This chapter dissects the Medici Bank as a cluster of contracts: a central partnership, branch partnerships, accomandite, woolshops, silkshops, and managers who were junior partners but also subordinates to the maggiori. De Roover uses the 1455 Bruges contract with Angelo Tani, Gerozzo de' Pigli, Piero di Cosimo, Giovanni di Cosimo, and Pierfrancesco di Lorenzo to show capital shares, profit shares, residence requirements, limits on credit, bans on gambling and women in quarters, insurance rules, annual balance sheets, and Mercanzia jurisdiction. He explains central administration through general managers from Benedetto and Ilarione de' Bardi to Giovanni Benci, Giovanni di Cosimo, Francesco Sassetti, and Giovambattista Bracci, and he distinguishes business letters from private reports addressed to magnifico major mio. The chapter also treats double-entry practice, libri segreti, balance sheets, time deposits, sopraccorpo, depositi a discrezione, Philippe de Commines, Ymbert de Batamay, and secret accounts held by nobles, cardinals, and courtiers. Source anchors: 1455 Bruges contract; Angelo Tani; Mercanzia; lettere private; sopraccorpo; Philippe de Commines.
Analysis: The 1455 Bruges contract and Angelo Tani show how de Roover turns legal clauses into an explanation of control: managers could trade, but only inside limits set by the maggiori and enforceable by the Mercanzia. The lettere private, libri segreti, and sopraccorpo reveal the Financial Infrastructure behind branch supervision, while Philippe de Commines and Ymbert de Batamay show why deposits were both a funding source and a reputational hazard. The chapter also sharpens Legibility because the bank can only govern distant managers when contracts, secret ledgers, private letters, and annual balance sheets make branch behavior visible.
VI - Banking and the Money Market at the Time of the Medici
Summary: De Roover explains fifteenth-century banking as exchange dealing rather than simple lending, with cambium contracts, bills of exchange, usance, rechange, exchange quotations, and the four parties of deliverer, taker, payor, and payee. A Venetian bill of July 20, 1463 for 500 ducats payable in London to Gherardo Canigiani lets him calculate sterling rates, protest fees before the notary William Slade, a redraft against Bartolomeo Zorzi and Geronimo Michiel, and a loss or gain equivalent to 14 percent per annum. He then moves through fixed and movable exchange, Bernardo Davanzati's diagram, market spreads between Venice and London, dry exchange, cambium sine litteris, fictitious exchange, the Florentine law of 1429, and the 1435 suspension favorable to bankers. The chapter closes by distinguishing letters of credit for Paul son of Baptist at Pavia, Anselm de Smit at the Curia, Astorre Manfredi of Faenza, early transfer orders and endorsements, and the special dangers of loans to princes secured by jewels, tax revenues, or customs assignments. Source anchors: cambium; usance; Gherardo Canigiani; William Slade; cambium sine litteris; Astorre Manfredi.
Analysis: Cambium, usance, and William Slade's protest make the money market concrete enough to understand how profit could be embedded in exchange rates while still looking different from open interest. Gherardo Canigiani and Astorre Manfredi connect the technical discussion to the Medici's actual branch business in London and Florence. The chapter is a precise Financial Infrastructure mechanism: bills, usance, rechange, notarial protest, and letters of credit let claims travel across cities, but the movement from cambium sine litteris to loans to princes prepares the reader for Edward IV, Francesco Sforza, and Charles the Bold, where exchange technique no longer protects the bank from immobilized credits.
VII - The Medici as Merchants and as Dealers in Alum and Iron
Summary: This chapter shifts from exchange to merchandise, showing the Medici as venture traders in wool, alum, cloth, spices, olive oil, citrus fruits, silk stuffs, brocades, jewelry, silver plate, tapestries, horses, choir boys for St. John Lateran, classical manuscripts, and even a brass chandelier shipped in numbered pieces. De Roover's detailed example of one hundred bales of almonds from Valencia to Sluys, Bruges, Bergen-op-Zoom, and Antwerp shows Piero del Fede, Riccardo Davanzati, Bosco di Giovanni, freight of 52 pounds groat, Damme tolls, damaged bales, local grocers, Nicholas van Drijl, and venture accounting. The alum story follows Tolfa, Civitavecchia, Pius II, Sixtus IV, Giovanni Tornabuoni, Tommaso Portinari, Luke de Tolentis, Flemish wholesalers, Trebizond alum, the treaty of May 5, 1468, the 1469 Bruges-Rome agreement, the Pazzi, and the seizure of stocks after 1478. The iron section turns to Elba, Piombino, the Magona del Ferro, Piero Filippo Pandolfini, Giovanni di Bernardo Cambi, Pisa, Pietrasanta, Pistoia ironmasters, Casentino customers, and consignments to Rome, Naples, and Palermo. Source anchors: one hundred bales; Tolfa alum; Luke de Tolentis; treaty of 1468; Magona del Ferro; Elba iron.
Analysis: The one hundred bales and venture accounting show why trade required granular attention to freight, tolls, damage, storage, and credit before any profit could be known. Tolfa alum, Luke de Tolentis, and the treaty of 1468 turn a papal monopoly into a Chokepoints and Gateways problem: Rome can grant privileged access, but Bruges, Flemish buyers, rival Genoese supply, and Burgundian policy all contest the passage from mine to cloth industry. Elba iron and the Magona del Ferro show Lorenzo searching for profit in cartel privileges after banking losses, which makes monopoly another attempted answer to the same liquidity problem.
VIII - The Medici as Industrial Entrepreneurs
Summary: De Roover places the Medici woolshops and silkshop inside the Florentine textile system, beginning with Giovanni di Bicci's 1402 woolshop under Michele di Baldo, the 1408 shop under Taddeo di Filippo, Giuntino and Andrea Giuntini after 1429, Antonio Taddei's 1439 shop, and Lorenzo's 1491 investment with Paolo Benci. The silkshop begins with Piero Corsi and Francesco Berlinghieri, then the 1438 partnership with Jacopo di Biagio Tanaglia, 5,000 florins of capital, later 7,200 florins, and continued operation through Berlinghieri di Francesco Berlinghieri, Jacopo Tanaglia, and the 1494 takeover by Lorenzo Tornabuoni. De Roover rejects Alfred Doren's picture of gigantic factories by showing domestic production, putting-out, botteghe di lana, botteghe di seta, 90 bolts of cloth a year, torcitoi, drawlooms, dyers, weavers, cabbaging, piece rates, and the Silk Gild's 1429 rule treating weavers as maestri. The 1497 statement for Piero di Lorenzo de' Medici & Co. shows the silkshop still had net worth, papal customers, Lyons as an outlet, advances to weavers, and debts to the Tavola and Bartolomeo Bartolini. Source anchors: Michele di Baldo; Antonio Taddei; Jacopo Tanaglia; Alfred Doren; torcitoio; 90 bolts.
Analysis: Michele di Baldo and Antonio Taddei demonstrate that textile profit depended on the same manager-selection problem as banking, but with hiring delegated to specialists because dyers, weavers, and subcontractors could not be managed from the Medici palace. Alfred Doren, torcitoio, and 90 bolts let de Roover scale the industry accurately: capitalist organization existed, but not modern factory size. Jacopo Tanaglia and the surviving silkshop statement show why manufacturing remained useful but secondary, a sideline tied to papal and court outlets rather than the source of Medici dominance.
IX - The Medici and the Financial Business of the Papacy: The Rome Branch of the Medici Bank
Summary: The Rome branch is really the branch following the Court of Rome, moving with Martin V to Santa Maria Novella, with Eugene IV to Florence, Bologna, Ferrara, and Florence again, while keeping its accounts in fiorini di camera. De Roover explains papal finance through the Camera Apostolica, the Chamberlain, the Apostolic Treasurer, the Depositary General, Introitus et Exitus books, papal collectors, annates, common and petty services, indulgence money, jubilee funds, and instrumenta cambii. The Medici repeatedly serve as depositary through Bartolomeo de' Bardi, Antonio Salutati, Antonio della Casa, Roberto Martelli, Giovanni Tornabuoni, and later lose or regain the post under Eugene IV, Nicholas V, Calixtus III, Pius II, Paul II, Sixtus IV, Meliaduce Cigala, and Gerardo Usumari. The chapter stresses the double nature of papal business: it gave prestige, deposits from cardinals, and remittance volume, but also created overdrafts of 70,432 and then 107,000 cameral florins, overcharges on silks and jewels, alum repayments, and cash strain when Sixtus IV lived beyond his means. Source anchors: Court of Rome; Camera Apostolica; Depositary General; Introitus et Exitus; Giovanni Tornabuoni; 107,000 cameral florins.
Analysis: The Court of Rome and Camera Apostolica explain why "Rome" is a mobile financial office rather than a fixed city branch, and the Introitus et Exitus records give de Roover an administrative audit trail outside the Medici books. Giovanni Tornabuoni and the 107,000 cameral florins show the trap in papal service: the depositary office attracted cardinals' deposits and Curial business but could force the bank to carry the pope's deficit. The chapter links State Capacity to Financial Infrastructure because papal revenue collection depends on bankers who can move annates, services, indulgence money, and benefice income across Europe, yet that same public-religious capacity shifts cash strain onto the Medici.
X - Medici Establishments in Italy: The Tavola in Florence and the Fondaco in Venice
Summary: De Roover distinguishes the central scrittoio in the Medici palace from the Tavola in via Porta Rossa near Mercato Nuovo, where the Medici were tavolieri, members of the Arte del Cambio, local bankers, money-changers, deposit takers, and dealers in bills and goods. The Tavola's 1427 balance sheet, 214 asset items, 155 liability items, 12,000 florins of capital, about 80,000 florins of short-term liabilities, only about 4,000 florins of cash, and debts to Rome and Venice show a local bank heavily funded by other Medici branches. The Venice fondaco develops from Neri Tornaquinci's failure with German credit to Giovanni Portinari, Lotto Tanini, Antonio Martelli, Alessandro Martelli, Giovanni Altoviti, and Giovanni d'Orsino Lanfredini, with trade in Spanish wool, saffron, furs, amber, linen, malmsey, pepper, cotton, and consignments from London and Bruges. Venice produces spectacular profits in 1439, suffers the Barcelona failure of Giovanni Venturi and Riccardo Davanzati in 1447, pauses after the 1451 Venetian expulsion of Florentines, revives after the Peace of Lodi, and is liquidated under Piero and then briefly re-established in 1471. Source anchors: Mercato Nuovo; 12,000 florins; 4,000 florins cash; Neri Tornaquinci; Barcelona failure; Peace of Lodi.
Analysis: Mercato Nuovo, 12,000 florins, and 4,000 florins cash make the Tavola a visible balance-sheet problem: a respected Florentine bank could operate with very thin reserves because family and branch resources stood behind it. Neri Tornaquinci and the Barcelona failure show Venice as a school of branch management and a warning about correspondents, Germans, Catalans, and protested bills. The Peace of Lodi and later liquidation show how even a profitable fondaco could be vulnerable to war, personnel changes, and Piero's contraction policy.
XI - Medici Establishments in Italy: The Branches in Naples, Milan, and Pisa
Summary: The Naples branch begins by 1400 with Castellano Frescobaldi, Adoardo Tornaquinci, Gaeta customs, Jacopo Bartoli, Rosso de' Medici, Fantino de' Medici, and an accomanda of 3,200 florins that ends in 1426 because returns are too low for the risks of the Kingdom of Naples. Lorenzo reopens Naples in 1471 under Agostino Biliotti, whose loose credit leaves frozen assets, then Francesco Nasi salvages the branch after King Ferdinand I's June 14, 1478 sequestration during the Pazzi war and after the Apulian accomanda at Trani, Bitonto, Gallipoli, Monopoli, Ostuni, and Terlizzi strains Rome and Venice. Milan begins in 1452 as a political office for Francesco Sforza, with Pigello Portinari supplying the ducal court, holding Sforza debts of 53,000 ducats in 1460 and 179,000 ducats by 1467, then Accerrito Portinari worsening liquidity and becoming the object of Lorenzo's anger after 1478. Pisa, acquired by Florence in 1406 with Porto Pisano, remains handled through Averardo's fondaco until Cosimo sets up the 1442 accomanda with Ugolino Martelli and Matteo Masi, later involving Carlo Marsuppini, Antonio Martelli, Ilarione di Bartolomeo, Giovanni Cambi, and Elba iron privileges. Source anchors: Gaeta customs; Agostino Biliotti; Ferdinand I; Francesco Sforza; 179,000 ducats; Porto Pisano.
Analysis: Gaeta customs and Agostino Biliotti show Naples repeatedly failing when court, legal, and regional risks outweigh normal mercantile returns, while Ferdinand I's sequestration shows how quickly political war could freeze a branch. Francesco Sforza and 179,000 ducats make Milan the clearest case of political alliance becoming immobilized credit. Porto Pisano and the Martelli accomanda show Pisa as a logistical and monopoly-adjacent office rather than the primary engine of the bank.
XII - Branches of the Medici Bank Outside Italy: Geneva, Lyons, and Avignon
Summary: De Roover follows the French trade route from declining Paris under Charles VI to Geneva, an episcopal city under Savoy whose Epiphany, Easter, Saint Peter in Chains, and All Saints fairs became a clearing center using the gold mark and ecus of 64 or 66. The Medici first work through Michele di Ferro and Antonio Bertini, then Giovanni d'Amerigo Benci, whose Geneva profits lead to an accomanda in 1426, a fuller partnership in 1439, Ruggieri della Casa's management, Giovanni Zampini's promotion, and Francesco Sassetti's rise before the move to Lyons. Lyons inherits Geneva's clearing role after French policy favors its fairs, while Sassetti, Amerigo Benci, Lionetto de' Rossi, Philippe de Commines, Ymbert de Batamay, and Lorenzo Spinelli appear in a later story of deposits, bad management, and attempts to rescue solvency. Avignon is tied to papal and southern French business through Giovanni Zampini, Montpellier, the Pazzi, Venturi, Nerli, Carnesecchi, and the branch network used for letters of credit, exchange, and remittances between Italy, Savoy, Burgundy, and France. Source anchors: Geneva fairs; ecus of 64; Michele di Ferro; Giovanni Benci; Lionetto de' Rossi; Avignon branch.
Analysis: Geneva fairs and ecus of 64 show how geography and a shared monetary standard created a clearing point where Medici exchange profits could be high without a large local market. Michele di Ferro and Giovanni Benci show the cautious progression from agent to accomanda to full branch, which is exactly the kind of controlled expansion Cosimo favored. Lionetto de' Rossi and the Avignon branch later show the same transalpine system under weaker supervision, where deposits and remittances could no longer be held together by Sassetti's judgment.
XIII - Medici Branches Outside Italy: Bruges and London
Summary: This chapter treats Bruges and London together because the Low Countries' unfavorable balance with Italy depended on English wool, Lombard Street, Calais, Southampton, Sandwich, Sluys, and the Florentine galleys. The Medici first use Filippo Rapondi, Galeazzo Borromei, Gualterotto Gualterotti, Totto Machiavelli, and Ubertino de' Bardi as correspondents, then send Bernardo Portinari in 1436 and create a Bruges accomanda in 1439, followed by London under Gerozzo de' Pigli in 1446 and Simone Nori in 1450. The London story turns on the War of the Roses, Edward IV's wool licenses, the 1463 statute, Gherardo Canigiani's loans, Angelo Tani's 1468 audit, and royal debts of 8,500 plus 2,000 pounds sterling. Bruges then becomes Tommaso Portinari's world: Hotel Bladelin, Charles the Bold, the toll of Gravelines, Burgundian galleys, Maria Bandini-Baroncelli, Cristofano Spini, Tommaso Guidetti, Rinieri da Ricasoli, Maximilian of Austria, the fleur-de-lys of Burgundy, the Guinea venture, and the 1480 break with Lorenzo. Source anchors: English wool; Gerozzo de' Pigli; Edward IV; Gherardo Canigiani; Hotel Bladelin; toll of Gravelines.
Analysis: English wool, Edward IV, and Gherardo Canigiani explain why London could not simply be managed by saying no: wool licenses were the Chokepoints and Gateways through which Italian balances were settled, and loans bought access to them. Gerozzo de' Pigli and Angelo Tani represent the cautious tradition that loses influence, while Hotel Bladelin and the toll of Gravelines show Tommaso Portinari turning branch management into courtly position and government finance. The 1480 break with Lorenzo is therefore not abrupt; it is the settlement of years of wool shortages, royal credit, Burgundian ambition, and Portinari's refusal to accept limits.
XIV - The Decline: 1464-1494
Summary: De Roover closes with the thirty years from Cosimo's death on August 1, 1464 to the Medici expulsion in 1494, when Piero the Gouty, Lorenzo the Magnificent, and Piero di Lorenzo inherit a bank already weakened by London, Venice, Milan, and falling profits. Piero orders audits, contraction, the Venice liquidation, Tani's London mission, Pigello Portinari's retrenchment in Milan, and limits on Tommaso Portinari's credit to Charles the Bold, while the bankruptcies of Matteo di Giorgio, the Baldesi, Piero Partini, Lodovico Strozzi, Lorenzo Ilarioni, Gianfrancesco Strozzi, Bartolomeo Zorzi, and the Salviati accompany the Venice-Turkish war of 1463-1479. Lorenzo relies on Francesco Sassetti, whose weakness toward Tommaso Portinari and Lionetto de' Rossi contrasts with Giovanni Benci's old discipline, and later reorganization plans by Giovambattista Bracci and Lorenzo Spinelli fail to revive a controlling partnership. The final causes include slender cash reserves below 10 percent, deposits a discrezione, heavy trading on equity, the Camera Apostolica, Orsini loans, English wool scarcity, papal remittances, the War of the Roses, Sforza finance, the toll of Gravelines, the Pazzi conspiracy, Charles VIII's invasion, and the fall of banchi grossi from seventy-two in 1422 to fewer than half a dozen by 1494. Source anchors: August 1, 1464; Piero the Gouty; Francesco Sassetti; Lionetto de' Rossi; cash reserves; banchi grossi.
Analysis: August 1, 1464 and Piero the Gouty mark the point where succession, illness, and incomplete retrenchment meet a banking structure already strained by London and Milan. Francesco Sassetti and Lionetto de' Rossi show how weak supervision allowed branch managers to defend local interests until losses became systemic. Cash reserves and banchi grossi turn the ending into a Financial Infrastructure failure: the Medici Bank collapses with Florentine international banking because deposits, thin equity, branch autonomy, papal remittances, and frozen political loans leave too little liquid capacity to absorb shocks.