| Church: | Church of Constantinople |
| Archbishop Of: | Ecumenical Patriarch of Constantinople |
| Term: | 2 February 1059 – 9 or 10 August 1063 |
| Predecessor: | Michael I Cerularius |
| Successor: | John VIII of Constantinople |
| Birth Place: | Constantinople, Byzantine Empire (modern-day Istanbul, Turkey) |
| Death Date: | 9 or 10 August 1063 |
Constantine III Leichoudes (Greek, Modern (1453-);: Κωνσταντίνος Γʹ Λειχούδης; died 9 or 10 August 1063) was the Ecumenical Patriarch of Constantinople from 1059 until his death in 1063.[1] [2]
Born in Constantinople, he was a fellow student of Michael Psellus and John Xiphilinus. He rose to high court offices: appointed protovestiarios, he later became proedros ("president") of the Senate and was one of the senior aides of emperors Michael V and Constantine IX. He also became abbot of the imperial Mangana Monastery, and in 1059, following the dismissal of Michael I Cerularius, he was elected into the patriarchal office, which he held until his death. He is considered a saint of the Eastern Orthodox Church, and is commemorated on 29 July.