The Orthodox clerics' negotiations with the Holy See about the appointment of an Orthodox patriarch proved unsuccessful. Theodore addressed a letter to Pope InnocentIII, requesting that he authorize the Orthodox clerics to elect the new patriarch. He also tried to persuade the Pope to acknowledge him as the supreme head of the Orthodox community, but the Pope ignored both requests. When the Latins broke the truce early in 1208, Theodore again approached the Pope and asked him to mediate a peace, proposing the Sea of Marmara as the permanent frontier between the Latin Empire and his realm.