A Crash Course on the Council of Constantinople IV (869-870)

In this stand-alone lesson, we will explore the Fourth Council of Constantinople (869–870), which addressed the controversial deposition of Patriarch Ignatius and the rise of Photius during a turbulent period in East-West relations. Recognized as an ecumenical council by the Catholic Church, it affirmed papal primacy and condemned Photius while issuing disciplinary canons to combat clerical corruption.