It's pretty well-known that the Pauline epistles in modern copies of the New Testament are generally ordered according to length.1 Of the epistles written to churches, Romans is longest and first, ...
In his Institutes of the Christian Religion, John Calvin discusses the idea that the Biblical canon depends on the ratifying action of the Church (Book 1, Chapter 7). He thinks it does not, preferring ...
The Didache (full text) is an early Christian document giving advice on various "practical matters" such as how to baptize, when to fast, how to celebrate the Lord's Supper, etc. It's hard to date, ...