Saint Gregory the Theologian
c. 329 – 390 · Post-Nicene Greek Fathers (Cappadocians) · Cappadocian
Commemorated January 25 → · also the Three Hierarchs, Jan 30
Gregory of Nazianzus; Archbishop of Constantinople (briefly), who presided over the First Council of Constantinople (381). One of the Three Holy Hierarchs of the Orthodox Church. The Church gives him the title "the Theologian" — shared only with St John the Evangelist and St Symeon the New Theologian. His Five Theological Orations (Orations XXVII–XXXI) are the foundational pre-Chalcedonian defence of Nicene Trinitarian theology and the doctrine of the Holy Spirit.