teacher. . . . The dogmas of the Church are not a matter for the emperor, but for the bishops." Gregory's letters to Leo have been accused of being apocryphal, and may not accurately reflect the real content of Gregory's correspondence with Leo. In 728, Leo sent to Italy a new exarch, Eutychius, to try to retrieve the situation. Eutychius sent an emissary to Rome, with instructions to kill Gregory and the chief nobility in the city, but the plot was uncovered and foiled. Next, he attempted to turn the Lombard king and dukes against the pope, but they retained their ambivalent stance, not committing one way or the other. That same year Gregory wrote to Patriarch Germanus I of Constantinople, giving the patriarch his support, and when Germanus abdicated, Gregory refused to acknowledge the new patriarch, Anastasius, nor the iconoclast rulings of a council summoned by Leo. In 729, Eutychius finally managed to bring about an alliance with the Lombard king, Liutprand, and both agreed to help the other deal with their rebellious subjects. After they had subjugated the dukes of Spoleto and Benevento, bringing them under Liutprand’s authority, they turned to Rome with the intent of bringing Gregory to heel. However, outside Rome, Gregory managed to break up the alliance against him, with Liutprand returning to Pavia. After this, Eutychius reached an uneasy truce with Gregory, and the pope in return forged a temporary truce between the Lombards and the Byzantines. Regardless, Gregory was still a devoted and vigorous defender of the empire. This was demonstrated in 730 when there arose another usurper, Tiberius Petasius, who raised a revolt in Tuscany. He was defeated by the exarch Eutychius, who received steady support from Pope Gregory. Gregory died on 11 February 731, and was buried in St. Peter’s Basilica. The location of his tomb has since been lost. He was subsequently canonized and is commemorated as a saint in the Roman calendar and martyrology on 13 February, although some martyrologies list him under 11 February. Miracle at the Battle of Toulouse (721) A miracle concerning Gregory II is linked to the victory over Muslim forces at the Battle of Toulouse (721). According to the Liber Pontificalis, in 720 Pope Gregory sent to Odo, Duke of Aquitaine, "three blessed sponges/baskets of bread". The Duke kept these, and just before the battle outside of Toulouse, he distributed small portions of these