Cyril of Jerusalem
Cyril of Jerusalem — Mystagogical Catecheses
Five post-baptismal lectures delivered at the Holy Sepulchre c. AD 350 — the most systematic early treatment of the sacraments, including the clearest patristic account of Real Presence and the Epiclesis.
Ecclesiology
Eschatology
Eucharist
Sacraments
9 annotated chapters
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Anonymous (Apostolic)
The Didache (Teaching of the Twelve Apostles)
The oldest surviving Christian catechism outside the New Testament — containing the earliest extra-biblical instructions for Baptism, the Eucharist, fasting, and church order. c. AD 50–120.
Ecclesiology
Eschatology
Eucharist
Sacraments
15 annotated chapters
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