Jacob Baradaeus, who had become Bishop of Edessa, consecrated Sergius as patriarch of Antioch at Constantinople,[1][4] thus cementing the schism in the church of Antioch into the non-Chalcedonian Syriac Orthodox Church and Chalcedonian Imperial Church.[6] Sources disagree on the date of Sergius' consecration as patriarch.[7] According to the Zuqnin Chronicle, he was consecrated in 544, whereas John of Ephesus in his Ecclesiastical History dates the consecration to 557.[7] Sergius resided at Constantinople for the duration of his term as patriarch,[1] for which he was later erroneously termed patriarch of Constantinople by the 14th-century historian Nikephoros Kallistos Xanthopoulos in his Ecclesiastical History.[5] He died a natural death,[1] either in 547 as per the Zuqnin Chronicle, or in 560 as per John of Ephesus.[7]