Resistance to Iconoclasm
Stephen's episcopate fell during the first phase of Byzantine iconoclasm, the imperial campaign against the veneration of icons inaugurated by Leo III the Isaurian, who reigned from 716 to 741. Sources name the patriarch Anastasius, the iconoclast successor to Germanus on the throne of Constantinople, among those whose orders Stephen defied. The tradition holds that Stephen refused to take the icons out of the churches under his care and was for this reason summoned from the Crimea to the capital.
At Constantinople he was imprisoned and tortured, and the tradition relates that he was freed only after the emperor's death. His return to Sourozh as an aged confessor, and his death there, account for his title and for his commemoration as a defender of the icons.