In this course, the student will focus on the development of Christian theology. The present course will cover developments starting with the end of the New Testament period and until the Great Schism. A special focus will be on the period of the Church Ecumenical Councils and on the theology developed in the Patristic period (during the first five centuries). Emphasis shall be given to those doctrines that have an important impact in theology in general and also to those that are of particular significance for the religious backgrounds of the students.