Alberic of Monte Cassino was a Cardinal in the

Roman Catholic Church The Catholic Church, also known as the Roman Catholic Church, is the largest Christian church, with 1.3 billion baptized Catholics worldwide . It is among the world's oldest and largest international institutions, and has played a ...

, who died in 1088. He was a cardinal from 1057. He was (perhaps) a native of

Trier Trier ( , ; lb, Tréier ), formerly known in English as Trèves ( ;) and Triers (see also names in other languages), is a city on the banks of the Moselle in Germany. It lies in a valley between low vine-covered hills of red sandstone in the ...

, and became a

Benedictine , image = Medalla San Benito.PNG , caption = Design on the obverse side of the Saint Benedict Medal , abbreviation = OSB , formation = , motto = (English: 'Pray and Work') , foun ...

. He successfully opposed the teachings of Berengarius, which were considered

heretical Heresy is any belief or theory that is strongly at variance with established beliefs or customs, in particular the accepted beliefs of a church or religious organization. The term is usually used in reference to violations of important religi ...

by the Pope, defending the measures of Gregory VII during the

Investiture Controversy The Investiture Controversy, also called Investiture Contest ( German: ''Investiturstreit''; ), was a conflict between the Church and the state in medieval Europe over the ability to choose and install bishops ( investiture) and abbots of mona ...

. 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 ''A''rs dictaminis (or ''ars dictandi'') refers to the art of letter-writing. The art of letter-writing often intersects with the art of rhetoric. History of Letter-Writing Greco-Roman Theory Early examples of letter-writing theory can be ...

'', or letter-writing (''De dictamine''). Many of his letters are found in the works of St. Peter Damian. One of his pupils, John of Gaeta, was the future Pope Gelasius II.I. S. Robinson, ''The Papacy 1073-1198'' (1990), p. 214.

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* 1088 deaths 11th-century German cardinals German Benedictines Year of birth unknown {{Germany-RC-bishop-stub