Under the just and wise rule of Theodoric the province flourished; but the people always regarded the Goths as barbarians, and when the Byzantines attacked Istria in 539-544 and 552 the troops of Vitalius, Belisarius, and Narses were welcomed. They called the Greek Government "Sancta Respublica," and erected basilicas in gratitude for the freeing of the land from the Arian Goths. Justinian re-established the Roman constitution with certain alterations, among which was the power of appeal to the court of the bishop, which gave him control and surveillance over the municipal functionaries. His power was not supreme, however, the military defence of the frontier being equally important. For some sixty years the "Schism of the Three Chapters" rent this part of Christendom, and caused a great deal of ill-feeling and many questionable actions. It arose from the Emperor Justinian in 544 condemning (1) the writings of Theodore, bishop of Mopsnestia, who anticipated the heresy of Nestorius; (2) the writings of Theodoret, bishop of Cyrus, against the twelve anathemas of S. Cyril of Alexandria, and the decrees of the Council of Ephesus; and (3) the letter of Ibas, bishop of Edessa, to Maris the Persian. The Latin Church, with Vigilius the pope at its head, declined to accept the Imperial decree, which was in contradiction to the Council of Chalcedon of 451. In 548 the pope, while at Constantinople, was induced to repudiate them; but, on finding how strong the opposition was, revoked his agreement in 550, and induced the emperor to summon a council, which met in 553 and condemned the three chapters and their authors. The pope returned to Rome, and died there in 554, having confirmed the decision of the Council of Constantinople, and anathematised those who refused to accept it. Notwithstanding this, the bishops of Lombardy, Venice, and Istria, with the Aquileian patriarch Macedonius at their head, and other bishops, refused, and this refusal produced the "Istrian schism," or schism of the "Tre Capitoli." Paulinus, who succeeded Macedonius, called a synod at Aquileia in 557, which repudiated the decision of the Council of Constantinople. Pelagius II., who was then pope, called in the secular arm, but the descent of the Lombards in 568 stopped the discussion. Euphrasius of Parenzo was one of the principal supporters of Macedonius, and the pope did not hesitate to make the most disgraceful charges against him. In 578 Paulinus transferred the patriarchate to Grado, so putting himself under Byzantine protection. Elias of Grado held the same opinions as his predecessor, even excommunicating his adversaries. His successor, Severus, holding the same views, Smaragdus the Exarch made an expedition to Grado in 588, took Severus and the bishops of Parenzo and Trieste to Ravenna, and kept them there in prison for a twelvemonth, till they agreed to condemn the three chapters. When they returned they found their clergy would not go with them, so a synod was convened at