The Didache Introduction
Who: Written by an anonymous author, possibly multiple sources compiled into one book at a later date. The title translates as “the teaching”, or in its full title: Teaching of the Twelve Apostles.
What: The Didache is basically a church handbook with a summarised collection of the basic teachings of the Church and Gospel, aimed at local church leaders and new converts. It is one of the earliest examples of a written catechism that still exists, and it was also considered by some Early Church Fathers to be a part of the New Testament at one point, whereas others viewed it as spurious and it was eventually not canonised.
Why: Tradition has it as being a collection of the Apostles teachings, so it was possibly written to preserve this information as they grew older or died, or moved away from the communities they planted.
When: Between 70-100 AD (possibly as early as 50 AD).
Keywords: didache apostolic fathers