Жоффруа I
First the Latin Patriarch of Constantinople, Gervasius promulgated a decree of excommunication against Geoffrey I and laid an interdict upon Achaea. Upon the request of Geoffrey I, however, on 11 February 1217 Pope Honorius III (1216–1227) declared that the patriarch was to relax the sentence within a week after the receipt of the papal letter. Then the patriarch sent out a legate who laid a new interdict upon the Principality of Achaea. But his act was again qualified by the pope as usurpation of the power of the Holy See.