Theology & Dogma
Filioque Controversy
The Western (Latin) addition of 'and the Son' (Filioque) to the Nicene Creed regarding the procession of the Holy Spirit. Orthodoxy maintains the original Creed: the Spirit proceeds from the Father alone. The Filioque was a major theological cause of the Great Schism of 1054.
Sources
- St. Photius the Great, Mystagogy of the Holy Spirit
- St. Mark of Ephesus, Speeches at the Council of Florence
- Council of Constantinople (879-880 AD)