Codex. The library
of Tradition and early Christian literature.
Church Fathers, Doctors, ecclesiastical writers and other texts that shaped the first centuries of Christianity and the world around it.
Voices that span the centuries.
Foundational authors of Christian history, from the first Fathers to the great Doctors. Study and formation material, to be read with discernment and in the light of the Church's teaching.
Under construction — authors will be classified by the admin.
Not finding what you're looking for?
Use the advanced search to combine filters by category, period, tradition, theme, language and type of work.
Read straight through, or look up by theme.
The Codex lets you go through a work from start to finish, or search specific passages by theme or category.
Choose where to start
Begin with the Church Fathers if you seek classic formation, or explore complementary texts for historical perspective.
Select the work
Each author has their works catalogued with introduction, dating and historical context.
Read at your own pace
Chapter by chapter, or jumping straight to what interests you.
Context and discernment
When available, explanatory notes, cross-references and Catholic guidance — especially in the complementary section texts.
Begin to study the Tradition.
The Codex is available free of charge for the most part. For full access and advanced features, discover Medalius Pro.