Michael I Cerularius

Michael I of Constantinople
Ecumenical Patriarch of Constantinople
The enthronement of Michael I, from the Madrid Skylitzes
SeeConstantinople
Installed25 March 1043
Term ended2 November 1058
PredecessorAlexius of Constantinople
SuccessorConstantine III of Constantinople
Personal details
Born
Michael Cerularius

c. 1000
Died21 January 1059 (aged c. 59)
Constantinople, Byzantine Empire
NationalityByzantine
DenominationEastern Orthodoxy
ResidenceConstantinople

Michael I of Constantinople (Cerularius or Keroularios; Greek: Μιχαὴλ Κηρουλάριος, romanized: Mikhaḗl Keroulários; c. 1000 – 21 January 1059) was the Ecumenical Patriarch of Constantinople from 1043 to 1059. His disputes with Pope Leo IX over church practices in the 11th century played a role in the events that led to the Great Schism in 1054.