Nazianzus was a small town the history of which is completely unknown. It became the Turkish village of Nenizi east of Ak-Serai (formerly Archelais), in the Ottoman villayet of Koniah, but has sometimes been wrongly identified with Diocaesarea.
Ecclesiastical history 
At the beginning of the fourth century Nazianzus was suffragan to Caesarea Mazaca; under Emperor Valens it formed part of Cappadocia Secunda, the metropolis of which was Tyana. Later it depended on Cappadocia Tertia and its Metropolitan of Mocessus. Finally it became a metropolitan see itself under Diogenes.
In 1370 it was united to the metropolitan see of Caesarea Mazaca (modern Kayseri).
Up to the year 1200, fourteen of its bishops are known. Its name is inseparably connected with its illustrious doctor and poet-bishop, St. Gregory of Nazianzus, son of a formerly pagan bishop of Nazianzus, who became bishop of Constantinople and Doctor of the Church.
See also 
- Saint Cæsarius of Nazianzus
- Gregory of Nazianzus the Elder
- Gregory of Nazianzus
- St. Nazianz, Wisconsin