Codex Gigas: the largest manuscript of the middle ages
historyofinformation.comIf you’re into this type of historical artifact, Codex Sinacticus from the fourth century was scanned at high resolution and is online at https://www.codexsinaiticus.org/en/
The National Library of Sweden has made the raw digitized files available under CCBY here for those of you who want to play around with their own visualization: https://data.kb.se/dark-17757824
The history behind the vulgate and sources used by Jermome is a great read. Wikipedia can take you down many fine rabbit holes. (This book has a very fine early vulgate bible in it)