Basil of Caesarea, also called Saint Basil the Great, was a bishop of Caesarea Mazaca in Cappadocia, Asia Minor. He was an influential theologian who supported the Nicene Creed and opposed the heresies of the early Christian church, fighting against both Arianism and the followers of Apollinaris of Laodicea.

Caesarea, also known historically as Mazaca, was an ancient city in what is now Kayseri, Turkey. In Hellenistic and Roman times, the city was an important stop for merchants headed to Europe on the ancient Silk Road. The city was the capital of Cappadocia, and Armenian and Cappadocian kings regularly fought over control of the strategic city. The city was renowned for its bishops of both the Greek Orthodox and Armenian Apostolic churches. After the Battle of Manzikert where the Byzantine Empire lost to the incoming Seljuk Empire, the city was later taken over by the Sultanate of Rum and became reconfigured over time with the influences of both Islamic and, later, Ottoman architecture.