Benedictine bishop, serving as Vatican librarian and cardinal legate. Born in Asti (Solero), Italy, in 1049, Bruno became a Benedictine while still young, and in 1079, Pope St. Gregory VII (r. 1073 - 1085) appointed him bishop of Segni. He left that see to reenter the monastic-life, becoming the abbot of Monte Cassino. Burno served as librarian to the Holy Roman See and as cardinal legate. Bruno's theologial work on teh Holy Eucharist set the standard for centuries. He was canonized in 1183.
(Taken from Our Sunday Visitor's Encyclopedia of Saints)