Alberic of Monte Cassino was a Cardinal in the Roman Catholic Church, who died in 1088.
He successfully opposed the teachings of Berengarius, which were considered heretical by the Pope, defending the measures of Gregory VII during the Investiture Controversy.
He is the author of numerous works in theology, hagiography, grammar, rhetoric and music; and is the author of the earliest medieval treatise on ars dictaminis, or letter-writing (De dictamine).
[1] One of his pupils, John of Gaeta, was the future Pope Gelasius II.
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