Berno of Reichenau

Berno (c. 978 – 7 June 1048) was the Abbot of Reichenau from his appointment by Henry II, Holy Roman Emperor, in 1008. He reformed the Gregorian chant. He compiled a tonarius, dealing with the organisation of the church chants into 'tones' – eight modes of the Gregorian chant. Following the reforms initiated under Abbot Immo, who imposed the Benedictine rule at Reichenau, under Berno's guidance the abbey reached its peak as a centre of learning, with a productive scriptorium, as a centre of Benedictine monasticism and eleventh-century liturgical and musical reforms in the German churches.