Anthimus VI of Constantinople

{{Short description|Three-time Ecumenical Patriarch of Constantinople from 1845 to 1873}}

{{Infobox Christian leader

| name = Anthimus VI of Constantinople

| image = Άνθιμος ο ΣΤ΄.jpg

| caption =

| church = Church of Constantinople

| archbishop_of = Ecumenical Patriarch of Constantinople

| term = 4 December 1845 –
18 October 1848
24 September 1853 –
21 September 1855
5 September 1871 –
30 September 1873

| predecessor = Meletius III of Constantinople
Germanus IV of Constantinople
Gregory VI of Constantinople

| successor = Anthimus IV of Constantinople
Cyril VII of Constantinople
Joachim II of Constantinople

| birth_name =

| birth_date = 1782

| birth_place = Kutali Island

| death_date = 18 October 1878

| death_place = Kandilli

| buried =

| religion = Eastern Orthodoxy

}}

Anthimus VI of Constantinople ({{langx|el|Ἄνθιμος}}; born Ioannides; 1782 – 18 October 1878) was the Ecumenical Patriarch of Constantinople for three periods from 1845 to 1848, from 1853 to 1855 and from 1871 to 1873.{{Cite web |title=Άνθιμος Στʹ (α) |url=https://ec-patr.org/oikoymeniko-patriarxeio/istoria/diatelesantes-patriarxes/ |access-date=21 February 2024 |website=ec-patr.org |series=Κατάλογος Οικουμενικών Πατριαρχών List of Ecumenical Patriarchs |date=25 July 2019 |publisher=Office of the Ecumenical Patriarch of Constantinople |language=el}}{{Cite book |last=Kiminas |first=Demetrius |url=https://books.google.com/books?id=QLWqXrW2X-8C |title=The Ecumenical Patriarchate - A History of Its Metropolitanates with Annotated Hierarch Catalogs |publisher=Wildside Press |date=2009 |isbn=9781434458766 |pages=30–44 |access-date=21 February 2024}} He was born in Kutali Island in the Sea of Marmara and died in Kandilli.

Before becoming a Patriarch, Anthimus was a monk at the Esphigmenou monastery in Mount Athos and became metropolitan bishop of Serres (1829), Prussa (1833) and Ephesus (1837). In 1845, he expanded the Katholikon of the monastery, adding two chapels, a vestibule and a porch to it.