The importance of the study of the Sources. The concept of canonical sources. The classification of the Sources. The relation between the history of canon law and other disciplines of history. Review of the sources of the following ecclesiastical traditions: Alexandrian, Antiochian, Armenian, Chaldean and Constantinopolitan. Apostolic Constitutions, Diadache, Didascalia Apostolorum, early ecumenical councils, Council in Trullo, Synodicon Orientale, nomocanons, canons of the Fathers.