Stone to Silicon

Communication · c. 285 BCE

Library of Alexandria

The Ptolemies try to collect every book in the world, and scholars flock to read them.

Founded in the early 3rd century BCE by Ptolemy I or II, the library may have held tens of thousands of papyrus scrolls. Scholars there, including Euclid, Eratosthenes and Callimachus, who created the Pinakes catalogue, made it the model of a research library.

See it in the living treeWikipedia

Arcs above join it to what it stood on, arcs below to what it led to. The bar places this stretch on the tree's whole timeline.

What it built on 3

What it led to 2

Related measurements

The dashed line marks when it first worked.

Manuscript production per century, Italy Latest: 1.42M manuscripts (1400) Source: Our World in Data