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3. Leonardo da Vinci’s Codex Leicester: $30.8 Million
Named after the Earl of Leicester, who purchased the document in 1719, the Codex is a scientific document, and Leonardo da Vinci’s most famous and most elaborate work of science. It gathers theories, sketches, and musings on geography, astronomy, the elements, and many other topics. All content is written in da Vinci’s signature mirrored writing. There are a total of 30 scientific journals in the world, and the Codex is considered the most valuable of them all. Bill Gates was the lucky buyer to take the manuscript home during a Christie’s auction in 1994. Bill Gates digitally scanned the document, which is now available on CD for everyone to have a look.
