Alexandria for recognition, but was met with excommunication after the pope received a letter from Quriaqos. The schism with Abraham and his supporters went unresolved for the remainder of Quriaqos' reign. He summoned another synod at Harran in 812/813. In c. 816, in response to an invitation from Prince Ashot Msaker to debate the Chalcedonian Theodore Abu Qurrah, Quriaqos sent Nonnus of Nisibis to represent the non-Chalcedonians. A dispute between the Archbishop Basil I of Tagrit and the Monastery of Saint Matthew erupted in 817 as Basil opposed the monks' election of a certain Daniel as archbishop, and Quriaqos was forced to intervene as the situation deteriorated. Quriaqos supported Basil I as the archbishop had precedence over all other bishops in the former Sassanian Empire, and excommunicated the monks. The patriarch convened a synod at Mosul to resolve the issue, and acknowledged Daniel as archbishop of the Monastery of Saint Matthew, on the condition that he accepted his subordination to the archbishop of Tagrit. Although the precedence of the archbishop of Tagrit was established at the synod, his power was limited, whereby it was decreed he must not act in a suffragan diocese without its bishop's consent, nor ordain a bishop without the approval of the archbishop of the Monastery of Saint Matthew, and thus the dispute was resolved. Quriaqos died soon after at Mosul in June or August 817, and was buried at Tagrit. As patriarch, he consecrated eighty-six bishops. Works Quriaqos issued forty-six canons at the synod of Beth Batin in 794/795, one of which ordered clergymen and laymen to not enter the churches of the Nestorians, Chalcedonians, and Julianists, and to not participate in their services. The canons also forbade the baptism of adherents of the aforementioned churches, and condemned clergymen who were involved in divination. As well as this, he enacted twenty-six canons at the synod of Harran in 812/813. The patriarch also wrote a biography of Patriarch Severus of Antioch, an anaphora, and ten letters in response to questions from Yeshu, deacon of Tirminaz. Additionally, he is credited with writing a book on theological teaching, divided into three volumes and 98 treatises. References Bibliography Syriac Patriarchs of Antioch from 512 to 1783 8th-century Syriac Orthodox Church bishops 8th-century Oriental Orthodox archbishops 9th-century Oriental Orthodox archbishops 817 deaths Year of birth missing People from Tikrit Syrian archbishops Upper Mesopotamia under the Abbasid Caliphate 8th-century people from