Sergius II of Constantinople

{{Short description|Ecumenical Patriarch of Constantinople from 1001 to 1019}}

{{Use dmy dates|date=January 2025}}

{{Infobox Christian leader

| honorific_prefix =

| name = Sergius II of Constantinople

| image =

| caption =

| church = Church of Constantinople

| archbishop_of = Ecumenical Patriarch of Constantinople

| term = June/July 1001

| term_end = July 1019

| predecessor = Sisinnius II of Constantinople

| successor = Eustathius of Constantinople

| birth_name =

| birth_date =

| birth_place =

| death_date = July 1019

| death_place =

| religion = Chalcedonian Christianity

}}

Sergius II of Constantinople ({{langx|el|Σέργιος Β′}}; died July 1019) was the Ecumenical Patriarch of Constantinople from July 1001 to 1019.

According to the history of John Skylitzes, he was a relative of the celebrated 9th-century patriarch Photius I. In 1001, he was abbot of the Monastery of Manuel, which had been re-founded by Photius I, when he was elected to fill the patriarchal see (June/July 1001).

According to the later legend, Sergius II was in the conflict with the Pope Sergius IV.[https://www.britannica.com/biography/Sergius-II-patriarch-of-Constantinople The Editors of Encyclopædia Britannica, Sergius II] "A story that Pope Sergius IV (1009–1012) sent Sergius II, a letter insisting on the Latin Trinitarian teaching that the Holy Spirit relates to both Father and Son (Filioque), thus initiating the Eastern schism when Patriarch Sergius II reacted by erasing the Pope's name from the Byzantine prayer intercessions, is the invention of 12th-century controversialists".

According to John Skylitzes, he died in July 1019. His successor was Eustathius.{{harvnb|PmbZ|loc=[https://www.degruyter.com/view/PMBZ/PMBZ29198 Sergios II (# 27044)]}}.