Martyrdom
On arriving at Cetatea Alba, then under the rule of a non-Christian governor, John was summoned and pressed to renounce Christ; he refused. The synaxarion relates that he was beaten fiercely with rods until his body was lacerated, and after a second beating left his flesh torn open. When he still would not deny the faith, he was bound by the legs to the tail of a wild horse and dragged through the streets of the city. By tradition some of the inhabitants scoffed at the martyr and threw stones at him as he was dragged. Finally a man overtook him and cut off his head with a sword.
According to the account, signs were seen over the saint's body after his death: at night a luminous pillar and a multitude of burning lamps appeared, and light-bearing figures were seen singing psalms. The tradition also relates that a priest who intended to remove the relics secretly was prevented by a warning received in a dream.