Born in Paphlagonia to noble parents Theodotus and Ruffina, who openly professed the Christian faith. For this, they were subjected to torture. Theodotus, praying, asked God for strength to endure suffering, and soon departed to the Lord. Ruffina, while in prison, gave birth to a son and also surrendered her soul to God, leaving the infant behind. The infant was taken in by a pious woman, Ammia, who raised him as her own son.
In his youth, Mamant, not yielding to pagan influences, taught his peers faith in Christ. He was persecuted by the ruler Democritus, who sent him to the emperor Aurelian. Mamant, steadfastly confessing his faith, refused to worship idols, for which he was subjected to cruel tortures, but did not renounce Christ.
After much suffering, including torture and being burned in a furnace, where he remained unharmed, Mamant was sentenced to be devoured by beasts. However, the beasts, instead of attacking, showed him respect. Ultimately, the saint was gravely wounded and, after walking 200 fathoms, passed away in a cave, where he heard a voice from heaven calling him to eternal life.
His holy relics were buried at the place of his death, and miracles occurred there. Emperor Julian, wishing to build a church in honor of the saint, encountered miracles that destroyed his constructions, which became a sign of his evil intentions.
