The video argues that the Medici Bank, founded in Florence in 1397, built an early version of modern international finance by turning trust and a network of branches into outsized profits, at one point holding roughly 100,000 florins of papal deposits in Rome against only about 25,000 florins of total capital. Giovanni di Bicci built the business on the papacy’s steady demand for bills of exchange, and his son Cosimo turned that wealth into political power by financing allies like Francesco Sforza and funding projects like the 40,000-florin renovation of San Marco. The narrator’s conclusion is that the bank died slowly, branch by branch and loan by loan, as later Medici delegated control to managers who made concentrated loans to rulers like Charles the Bold, until the family’s 1494 expulsion from Florence finished it after 97 years.
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Giovanni’s lean, high-return model: Giovanni inherited only one-fifth of a modest estate, used a 1,500-florin dowry in 1385 to take control of the Rome branch, and opened the Medici Bank in Florence in 1397 with a Venice branch following in 1402. With about 20,000 florins in capital and no more than 17 employees, the bank earned roughly 151,000 florins (about $76 million in today’s gold value) from 1397 to 1420, an average return of about 32%.
The papacy as financial backbone: The Rome branch produced more than half the bank’s profits because the traveling papal court needed constant cross-border transfers, credit, and payment services. From 1435 to 1450, profits reached about 290,700 florins, with the Medici taking roughly 70% (around $151 million today).
Cosimo turns money into power: Exiled by rival Rinaldo degli Albizzi’s faction in 1433, Cosimo returned in September 1434 when a friendly Signoria took office, and Albizzi was exiled instead. He then used loans and patronage, backing Francesco Sforza’s bid for Milan and funding San Marco and Fra Angelico’s work, to blur the line between Medici business and Florentine state interests.
Delegation and concentrated sovereign risk: After Cosimo died on August 1, 1464, Piero and then a 20-year-old Lorenzo kept a weaker grip on branch managers, and bad loans to princes piled up while Geneva/Lyon kept uncollectable debts on the books as assets. Milan closed in 1478 and Avignon in 1479, and Tommaso Portinari’s Bruges branch lent heavily to Charles the Bold, who was killed at Nancy in 1477, contributing to a combined Bruges-London shortfall of about 70,000 ducats.
The political collapse of 1494: Lorenzo’s son Piero, about 21, negotiated passage for Charles VIII’s invading French army, which Florentines saw as a humiliation, and the Medici were expelled after the French entered Florence on November 17, 1494. Medici property and possessions were sold off in 1495, and although the family returned in 1512 and later ruled Tuscany, the original bank never recovered.
