This is a common question…”What is the Patristic era?”
It comes from the Greek term “pater”… (Fathers), which pertains to AD 100-750, after the writings of the New Testament. That “era” began after the death of the Apostles of Christ. The middle ages fell after that.
There are a few authors of writings that were during that time period such as; Augustine, Irenaeus, Tertullian and Tertullian.