Origen on the Psalms

Encyclopedia of ancient Christianity

Encyclopedia of the early church

Patrology

PATROLOGY: THE EASTERN FATHERS FROM THE COUNCIL OF CHALCEDON (451) TO JOHN OF...; ED. BY ANGELO DI BERARDINO

History of theology

Origins and Significance of Christian Feasts

Ancient Christianity

Diccionario de literatura patrística

We believe in one holy Catholic and Apostolic Church

Diccionario Patrístico y de la Antiguedad Cristiana, 1, A-I