Great Schism between Rome and Constantinople
July 16, 1054
A papal legation led by Cardinal Humbert of Silva Candida strode into Hagia Sophia during the liturgy and slapped a bull of excommunication on the high altar, then walked out. The patriarch returned the favor. A rift over unleavened bread, papal primacy, and the filioque became permanent alienation. The mutual excommunications would not be formally lifted until Pope Paul VI and Patriarch Athenagoras met in 1964.
In context
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Before and after in Europe
Before and after in Religion
Era
High Middle Ages (1000–1300), one of 1,306 events from that era on Saeculum.