Interesting bit about the Vatican archives. They exist in the mainstream culture as hidden but the original word for them was the Latin "secretorum" which we translate to secret or hidden. In reality the Latin form of this is more like "private" as we would consider it. The private records of the church they have collected over the course of 2000 years. While they certainly have plenty of things in there that have a broader historical implication the vast majority of it is almost certainly versions of scripture and commentaries. Commentaries on commentaries written by Catholic priests and monks century over century.
We can make this determination from other archives held by smaller Orthodox churches that are obviously interested in the same things but don't have the centuries of authority and means to have such a vast archive of their own.
The process to get into the Vatican Archives for members of the church is nuts though. The entire place isn't organized either. Like they at no point went in and said lets use the dewey decimal system to catalog all of this.
