Church history

Professing the faith

Catechism 185–197

Passion, death and redemption

Catechism 571–630

Unity across liturgical traditions

Catechism 1200–1209

Conversion, penance and reconciliation

Catechism 1420–1498

Holy Orders and ordained ministry

Catechism 1533–1600

Apostolic Christianity

Early Christian communities and persecution

The patristic and conciliar era

Medieval Christianity

Eastern and Western divisions

Reformation and Catholic reform

Missions, colonialism and global Catholicism

Modern Catholicism and the councils

Failures, abuse, accountability and reform

Council study: Nicaea I

Council study: Constantinople I

Council study: Ephesus

Council study: Chalcedon

Council study: Constantinople II

Council study: Constantinople III

Council study: Nicaea II

Council study: Constantinople IV

Council study: Lateran I

Council study: Lateran II

Council study: Lateran III

Council study: Lateran IV

Council study: Lyon I

Council study: Lyon II

Council study: Vienne

Council study: Constance

Council study: Florence

Council study: Lateran V

Council study: Trent

Council study: Vatican I

Council study: Vatican II

Reading historical sources

Saints and religious orders

Sacred art, architecture and music

Eastern Catholic Churches

Latin liturgical and spiritual traditions

Study Ambrose of Milan

Study Athanasius of Alexandria

Study Augustine of Hippo

Study Basil of Caesarea (Basil the Great)

Study Clement of Alexandria

Study Clement of Rome

Study Cyprian of Carthage

Study Cyril of Alexandria

Study Cyril of Jerusalem

Study Eusebius of Caesarea

Study Gregory of Nazianzus (Gregory the Theologian)

Study Gregory of Nyssa

Study Hermas

Study Ignatius of Antioch

Study Irenaeus of Lyons

Study Jerome

Study John Chrysostom

Study Justin Martyr

Study Origen

Study Polycarp of Smyrna

Study Gregory the Great

Study Leo the Great

Study Tertullian