The Holy Martyrs Stratonicus and Hermylus, Slavs by origin, lived at the beginning of the fourth century during a persecution against Christians by the emperor Licinius (307-324). St Hermylus served as deacon in the city of Singidunum (Belgrade). Condemned by Licinius to imprisonment, he was long and cruelly tortured for Christ, but he remained unyielding.
St Stratonicus was one of the prison guards and a secret Christian. Seeing the agonizing torments of his friend, he was unable to keep from weeping, and he revealed that he was a Christian. They also subjected him to punishment.
After the torture, they put both martyrs into a net and threw them into the Danube. On the third day, the bodies of the saints were found by Christians on the bank of the river and buried near Singidunum. Their venerable heads were in the Church of Hagia Sophia, where the Russian pilgrim Anthony saw them in the year 1200.