This course provides an introduction to the canon law of the Church: East and West. First, the Sacred canons of the first millennium will be examined as the common canonical foundation to the entire Christian Church. Second, developments in the medieval era will be compared in the Byzantine East and the Latin West. Third, the process of legal codification in the Catholic Church will be examined to see one approach to applying historical legislation in the contemporary Church. Finally, numerous themes will be examined to provide a cursory overview of the Catholic Church system of canon law, with special attention to questions related to ecclesiology, sacraments, and sanctions in the Church.