The Invention of Printing.
Eusebius, Cesarius. Chronicon. (4to. Venice, Erhard Ratdolt, 13 Sept 1483.)
The second and last early edition of Eusebius’ timeline of world events. His portion of the chronicle extends to 325 AD (he died in 339), but additions were made by Matteo Palmieri and Bonino Mombriti. In 1457, they credit Gutenberg with the invention of printing…in 1440.
Why didn’t they just put the entry back under 1440? One theory, given what they write, is that they’re accounting for the time it took the technology to spread from Gutenberg to at least Fust and Shoeffer, whose earliest printed works in Mainz are dated to 1457. While Gutenberg’s earliest works are “job lots” like indulgences, and of course the Bible, his invention would have to spread before it was possible for printed books themselves to do so. The spread of printed books across the earth is the focus of the above entry - which claims that a little bit of cash can buy you all of the writings of antiquity.