Quriaqos of Tagrit (, ) was the Patriarch of Antioch, and head of the Syriac Orthodox Church, from 793 until his death in 817. He is commemorated as a saint by the Syriac Orthodox Church in the Martyrology of Rabban Sliba, and his feast day is 13 or 16 August. Biography Quriaqos was born and raised at Tagrit in the 8th century, and became a monk at the Monastery of the Pillar near Raqqa, where he studied theology. He was elected as patriarch of Antioch, and ordained at Harran on 17 August 793. Soon after his ascension to the patriarchate, Quriaqos had to resolve the issue of Zachariah, the former Bishop of Edessa, who had been deposed by Patriarch George I of Antioch in 785/786 due to complaints from the city's clergymen and chief laymen, and had unsuccessfully petitioned Quriaqos' predecessor Joseph to restore him to his former see. Quriaqos travelled with Zachariah to the city, and it was agreed that he would receive four rural districts in the diocese on the condition that they revert to the city's bishop on his death, and he ordained a monk of Qenneshre named Basil as bishop of Edessa. In the same year as his ascension to the patriarchate in 793, Quriaqos travelled to Tagrit in response to an appeal to resolve a dispute between the archbishop of Tagrit and the monks of the Monastery of Saint Matthew. The patriarch declared that the archbishop of Tagrit had the authority to ordain an archbishop for the monastery, Nineveh, and some churches of Mosul. Quriaqos aimed to put to an end to the phrase, 'we break the heavenly bread in the name of the Father and of the Son and of the Holy Ghost' in celebrating the Eucharist, which the Patriarch George had declared heretical as he argued it implied a division of the person of Christ, but its usage had not been banned in fear of a schism as it was popular at the monasteries of Gubo Baroyo and Qartmin. Priests ordained by Quriaqos were forbidden from using the phrase. This drew the ire of the proponents of the phrase, and at the synod of Beth Batin in November 794/795, it was decided that the phrase was permissible, to Quriaqos' chagrin. The patriarch's opponents further disrupted his policies in his attempt to reconcile with the Julianists, a fellow non-Chalcedonian sect. Quriaqos held a synod