Gregory of Nazianzus

Gregory of Nazianzus (c. 329–390) was a theologian, poet, and orator of the early Christian Church, widely regarded as one of the Cappadocian Fathers. Born in Arianzus, near Nazianzus in Cappadocia, he studied in Athens alongside Basil of Caesarea, forging a lifelong friendship that shaped orthodox Christian thought. He served briefly as Archbishop of Constantinople, where he presided over the First Council of Constantinople in 381. His sermons, letters, and theological orations — particularly the "Five Theological Orations" — proved instrumental in defending Trinitarian doctrine. He is venerated as a saint in both Eastern and Western Christian traditions.