The foundation of Christianity. The setting in Judaism and Roman Hellenism ; Jesus of Nazareth ; The earliest Christian communities ; Early Christian worship and doctrine ; Early Christian theologies and the New Testament -- The development of Christian Hellenism. The church of the martyrs ; The church and the Christian empire -- The medieval struggle for a Christian society. The "Dark Ages" ; Early medieval Europe ; The later Middle Ages -- Renaissance and Reformation. The age of Reformation -- The modern world. The age of reason and piety ; The age of romanticism and industrialism ; Christianity in the New World ; Christianity after Christendom.