Herman I (died 11 April) served as Archbishop of Cologne from 889,[1] until his death around 924. He was the son of Erenfried I of Maasgau, of the Ezzonian dynasty.As chancellor of Zwentibold, King of Lotharingia, he helped to execute in 911 his kingdom's annexation to West Francia. In 921, he was a signatory of the Treaty of Bonn and, in 922, participated in the Synod of Koblenz.
He died around 924 and was buried in the Hildebold Dom in Cologne.