Editing Dionysius Exiguus (section)

==Works and translations==
Dionysius translated standard works from Greek into Latin, principally the "Life of St. Pachomius", the "Instruction of St. Proclus of Constantinople" for the Armenians, the "De opificio hominis" of St. Gregory of Nyssa, and the history of the discovery of the head of [[St. John the Baptist]] (written by Archimandrite Markellos). The translation of [[Cyril of Alexandria|St. Cyril of Alexandria's]] synodical letter against Nestorius, and some other works long attributed to Dionysius are now acknowledged to be earlier and are assigned to Marius Mercator.

Of great importance were the contributions of Dionysius to the tradition of canon law. His [[Collectiones canonum Dionysianae|several collections]] embrace:

{{ordered list| A collection of synodal decrees, of which he has left two editions:{{ordered list|type=lower-alpha
| ''Codex canonum Ecclesiæ Universæ''. This contains canons of Oriental synods and councils only in Greek and Latin, including those of the four œcumenical councils from Nicæa (325) to Chalcedon (451).
| ''Codex canonum ecclesiasticarum''. This is in Latin only; its contents agree generally with the other, but the Council of Ephesus (431) is omitted, while the so-called "Canons of the Apostles" and those of Sardica are included, as well as 138 canons of the African Council of Carthage (419).
| Another bilingual version of Greek canons, undertaken at the instance of [[Pope Hormisdas]], only the preface has been preserved.}}
| A collection of papal Constitutions (''Collectio decretorum Pontificum Romanorum'') from Siricius to Anastasius II (384–498).}}