1082–1098), also known as Bruno, was an imperialist Roman Catholic cardinal and priest of Santi Silvestro e Martino ai Monte during the Investiture Controversy.
He was one of the bishops who abandoned Pope Gregory VII (Hildebrand) in 1084 and consecrated Antipope Clement III, the candidate of Emperor Henry IV, in Rome.
Since earlier that year Pope Gregory had used the property of the church of Canossa against the antipope, the cardinals decision must be regarded as a direct rebuke of the pontiff.
This eight-letter document has the collective title Benonis aliorumque cardinalium scripta ("Writings of Beno and the Other Cardinals").
The anti-Urbanist tract De Albino et Rufino was attributed to Beno on slim evidence by Julius von Pflugk-Harttung in the 19th century.