Fontes Christiani is a widely-cited German bilingual collection of patristic and medieval Latin works with modern German translations. Published initially by Herder, a long-established German theological publisher beginning in 1988, it is now published by the Belgian company Brepols, a major specialized academic publisher in the humanities. More than 50 texts have so far appeared, of which 36 were edited by Herder.
The texts which have appeared cover a wide range of authors including on a random selection Irenaeus of Lyons, Tertullian, Origen of Alexandria, Aphrahat, Gregory of Nazianzus, Ambrose, Gregory of Nyssa, Theodore of Mopsuestia, Cassiodorus, John Philopon, Abelard, Rupert of Deutz. These are intended to be appropriate for individual purchasers as well as research libraries.
The editorial responsibility is taken by the "Verein zur Förderung der „Fontes Christiani“ e. V.", the Fontes Christiani Institute in Bochum.