Although these troubles were continuing to trouble John in Rome, he was still able to participate and influence broader ecclesiastical and political questions across Europe. In 920, he was asked by the Byzantine Emperors Romanos I and Constantine VII and the Patriarch of Constantinople Nicholas Mystikos to send some legates to Constantinople to confirm the acts of a synod which condemned fourth marriages (a legacy of the conflict which embroiled Constantine’s father Leo VI the Wise) thereby ending a schism between the two churches.