Mia Energeia: Untersuchungen zur Einigungspolitik des Kaisers Heraclius und des Patriarchen Sergius von Constantinopel

During the reign of emperor Justinian (527-565 AD), the Church of the (Roman) Empire was split due to the different reception of the Christological formula of the Council of Chalcedon (451). On the one hand, the Apostolic See of Rome and the Latin speaking West defended the synod. On the other hand, followers of the Christology of St. Cyril of Alexandria in Egypt und Syria sought to overrule what they understood as €œNestorianism€. It was not until the years 628 to 633 that the Byzantine Emperor Heraclius (610-641) was able to restore the unity of the Church by promoting a new formula of compromise: The teaching of a single €œoperation€ ( energeia ) in Christ. Christian Lange discusses the period between the Council of Chalcedon (451) and the final failure of all attempts to avoid a split in the Church of the Empire in the 7th century.