Treatise from late first century or early 2nd century
First line: "Teaching of the Lord to the Gentiles (or Nations) by the Twelve Apostles"
Oldest surviving written catechism;
•Rituals such as baptism and Eucharist
Church Fathers: Some considered it as part of the New Testament; others rejected it as non-canonical.
For the experienced searcher only!
This intimidating and difficult site provides the full text of many very hard to find church documents, like a full set of council documents known as Mansi