Confession Under the Iconoclasts
Michael's witness belongs to the second wave of Byzantine iconoclasm, which reopened under Leo the Armenian after a period of restored icon veneration. The synaxarion places him among the envoys whom the Church sent to reason with the emperor, a mission that ended in his beating and exile rather than in the persecution's cessation.
His companions on this confession, the brothers Theodore and Theophanes, are themselves venerated as confessors. Under Theophilus they were branded on the face with iron inscriptions composed to slander them, from which they received the surname 'the Branded' (Graptoi). Michael shared in their sufferings for the same cause, enduring beatings and exile for his refusal to abandon the icons.