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. 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. Clement was eventually beheaded by a Roman soldier whilst he was celebrating the Divine Liturgy in the year 312. He is venerated on January 23 according the Gregorian calendar and on February 5 according to the Julian calendar in some Eastern Orthodox countries together with his disciple Agathangelus of Rome.