The Eusebian Canon Tables: Ordering Textual Knowledge in Late AntiquityOne of the books most central to late antique religious life was the four gospel codex, containing the Gospels of Matthew, Mark, Luke, and John. A common feature in such manuscripts was a marginal cross referencing system known as the Canon Tables. This reading aid was invented in the early fourth century by Eusebius of Caesarea and represented a milestone achievement both in the history of the book and in the scholarly study of the fourfold gospel.