Humbert of Silva Candida
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"Cardinal Humbert" redirects here. For the Papal legate to Spain, see Uberto Lanfranchi.
Humbert of Silva Candida, O.S.B., also known as Humbert of Moyenmoutier (c. 1000 to 1015 – 5 May 1061) was a French Benedictine abbot and later cardinal. It was his act of excommunicating the Patriarch of Constantinople, Michael I Cerularius, in 1054 that is generally regarded as the precipitating event of the East–West Schism between the Roman Catholic Church and the Eastern Orthodox Church.