Under construction.
- Apostle: One of the twelve men (as well as Paul) specially commissioned by Jesus to preach the gospel.
- Gnostic: An adherent to a religious movement that competed with Christianity in its earliest days. It is characterized by the beliefs that matter is evil, that gnosis (or enlightenment) is the highest religious ideal, and that there is a distinction between one supreme God and lesser deities (such as the demiurge).
- Codex Sinaiticus: One of the earliest examples of a complete Greek New Testament.
- Bishop
- Pentarchy
- Eremetic monasticism
- Cenobitic monasticism
- Council of Nicaea
- Council of Ephesus
- Council of Chalcedon
- Council of Constantinople
- Miaphysite
- Theotokos
- Patriarchate
- Creed
- Oecumenical
- Basilica (See pg. 197)
- Holy Sepulchre
- Ousia
- Homoousios
- Prosopon
- Physis
- Hypostasis
- Canon: The books of Scripture determined by the church to be authentic.
- Trinity: The belief that there are three persons within one divine essence.
- Christology: The doctrine of Christ.
