Sergius II (d. July 1019 in Constantinople) was the Patriarch of Constantinople from July 1001 to 1019. "Whatever the reason, the Patriarch of Constantinople, also called Sergius, did not include the new Pope's name in the Diptychs: these are lists, kept by each Patriarch, which contain the names of the other Patriarchs, living and departed, whom he recognizes as orthodox."[1]