St. Clement the Hieromartyr, Bishop of Ancyra

Hieromartyr Clement, Bishop of Ancyra or simply Clement of Ancyra (c. 258-312) (born in Ancyra present-day Turkey) was a bishop who served during the rule of Roman emperor Diocletian.

Icon of Saint Clement of Ancyra. Image source: Wikipedia, public domain.

At first he lived as a monk, later he became the bishop of his city. He suffered so many things in confession of the Faith in Christ, that the time of his sufferings and struggles stretched out over a period of twenty-eight years.

He was arrested by Roman authorities and tried by Diocletian. Emperor Diocletian attempted to convert Clement to Paganism but Clement refused and withstood tremendous torture. Finally he and Saint Agathangelos (who was from Rome) were beheaded together during the reign of Diocletian and Maximian, in the year 296 (or 312).

References:
Clement of Ancyra - Wikipedia, the free encyclopedia
Clement the Hieromartyr & Bishop of Ancyra — Greek Orthodox Church