Independence from Imperial Power
Polyeuctus is consistently portrayed as a patriarch who guarded the independence of the Church against imperial pressure. Although appointed by Constantine VII, he showed little deference to the emperor, openly raising the question of the legitimacy of the marriage of Constantine's parents and restoring the standing of Patriarch Euthymius I, who had earlier contested it.
His most celebrated confrontations came with the soldier-emperors who followed. He barred Nikephoros II Phokas from communion over his marriage to the empress Theophano, invoking a canonical impediment of spiritual kinship. After Nikephoros was murdered, Polyeuctus refused to perform the coronation of John I Tzimiskes until the new emperor had punished those responsible for the assassination and removed Theophano, who was implicated in the plot, from the palace.