3min snip

Planet Money cover image

Summer School 3: Accounting and The Last Supper

Planet Money

NOTE

Luca Petroulli's Encyclopedia

Luca Petroule, a monk and mathematician, played a crucial role in the history of accounting with his invention of double-entry bookkeeping. Petroule's instructions and examples were buried in a massive encyclopedia, which also featured math puzzles and games. Leonardo da Vinci was one of the early readers of the book and used its principles in his painting of the Last Supper. Petroule's work became a hit and Leonardo saw it as the coolest mathematics text of its time.

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