The Codex Leicester Updated May 2026

The name "Leicester" comes from a later owner, the Earl of Leicester, who bought it in 1717. But its most famous modern owner? .

And it just so happens to be one of the most expensive books on planet Earth. Despite the fancy name, this isn't a dusty medieval poem. It is a 72-page scientific notebook written entirely by Leonardo between 1506 and 1510. It is a firehose of genius, covering geology, astronomy, optics, hydrodynamics, and paleontology. the codex leicester

That Leonardo lives in the Codex Leicester . The name "Leicester" comes from a later owner,