at the Monastery of Nawawis in 797/798, and on 7 September, a union with the Julianists was agreed after a creed co-written by Quriaqos and the Julianist patriarch Gabriel was accepted. It was stipulated that Gabriel would become the next patriarch of Antioch if Quriaqos predeceased him. However, the agreement did not come to fruition as Quriaqos' opponents refused to accept the union, and accused him of becoming a Julianist. Quriaqos had some success in confronting his opponents, in that Severus of Samosata was successfully dealt with after the patriarch appealed to the Muslim authorities. His success was short-lived as Quriaqos' deposition of Bishop Bacchus of Cyrrhus prompted an open schism. Bacchus was deposed after several warnings, but he defied the patriarch, encouraged the use of the aforementioned 'heavenly bread' phrase amongst clergymen in his diocese, and demanded that all future bishops of Cyrrhus have first been a monk at the Monastery of Gubo Baroyo, where he resided. Quriaqos disregarded Bacchus' demand, and ordained Solomon, a monk of the Monastery of Jacob of Cyrrhus, as bishop, but this incensed his opponents, and Quriaqos was removed from the diptychs of the diocese of Cyrrhus. The dispute escalated in 807 as monks from the Monastery of Gubo Baroyo met with the Caliph Harun al-Rashid, and accused Quriaqos of being an eastern Roman sympathiser and spy, and of constructing churches on the frontier with the eastern Roman Empire so to further aid them in the conflict against the caliphate. All churches on the frontier were thus destroyed on the caliph's orders, as well as churches at Antioch and Jerusalem. The patriarch survived the incident unscathed as Harun's secretary Isma'il ibn Salih, who was acquainted with and on good terms with Quriaqos, was charged with handling the accusations, and exiled the monks. To reassert his authority on the church, Quriaqos summoned a synod at Beth Gabrin near Cyrrhus in 807/808, and excommunicated and deposed his opponents. After the synod, a monk of Qartmin named Abraham, who was resentful towards Quriaqos for refusing to pardon his brother Simeon, a monk of Gubo Baroyo, joined the schismatics and was subsequently proclaimed patriarch by the monks of Gubo Baroyo. Abraham consecrated his own bishops, accused Quriaqos of being a Julianist, and promoted the 'heavenly bread' phrase, to which the patriarch responded by excommunicating him and his supporters. Abraham unsuccessfully appealed to the Coptic Pope Mark II of