12th Century
- Frederick I Barbarossa, Holy Roman Emperor, by Alexander III
- Anselm V (Archbishop of Milan) by Pope Honorius II
- William I of Sicily, by Pope Adrian IV, while the king was waging war against the papal states and raiding pilgrims on their way to the tombs of the apostles.
- Ralph I, Count of Vermandois was said to have been excommunicated in 1142 by Bishop Saint Ivo of Chartres for repudiating his lawful wife and marrying another
- Roger II of Sicily, was excommunicated under the decrees of the Second Lateran Council in 1139
- Anacletus II, antipope
- Holy Roman Emperor, Henry IV, excommunicated a second time by Pope Paschal II for refusing to abjure his claim to imperial investitures
Read more about this topic: List Of People Excommunicated By The Roman Catholic Church
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“Often even a whole city suffers for a bad man who sins and contrives presumptuous deeds.”
—Hesiod (c. 8th century B.C.)