Stephen not only called Cyprian Antichrist, but in seeking to clinch the rightness of his own opinion, he appealed to Christ’s punning proclamation in Matthew’s Gospel ‘Thou art Peter, and on this rock I will build my Church’ (Matthew 16.18).46 It is the first time known to us that the text had been thus used by a Bishop of Rome; this row in 256 represents another significant step in Rome’s gradual rise to prominence.