Saint Leo IX
(born 1002, Egisheim, Alsace, Upper Lorraine — died April 19, 1054, Rome; feast day April 19) Pope (1049 – 54). He was consecrated bishop of Toul in 1027. He was named pope by Emperor
Henry III but insisted on election by the clergy and people of Rome. His efforts to strengthen the papacy and eradicate clerical marriage and
simony laid the foundation for the Gregorian reform movement. His assertion of papal primacy and his military campaign against the Normans in Sicily (1053) alienated the Eastern church. His representatives excommunicated the patriarch of Constantinople. Though Leo had already died, their act triggered the
Schism of 1054.
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