Theodore the Studite
With the iconodule policy of his predecessors associated with defeats at the hands of Bulgarians and Arabs, Leo V reinstituted Iconoclasm after deposing patriarch Nikephoros and convoking a synod at Constantinople in 815. The Emperor used his rather moderate iconoclast policy to seize the properties of iconodules and monasteries, such as the rich Stoudios Monastery, whose influential iconodule abbot, Theodore the Studite, he exiled.