Bardo (c. 980 – 10/11 June 1051) was the Archbishop of Mainz from 1031 until 1051, the Abbot of Werden from 1030 until 1031, and the Abbot of Hersfeld in 1031. Bardo was born in in the Wetterau. He was educated and trained at the Abbey of Fulda, where he was selected to be the deacon and provost of Neuenberg in 1018. Towards the end of March in 1029 the Emperor Conrad visited Fulda, who appointed him in the following year the Abbot of Werden. He was said to have taken special attention to the obedience of the monks and quality of their service, and he established a hospitality and care service for those injured in war. In early in 1031 Bardo was transferred to become the abbot of Hersfeld, and by May 30 was again transferred to become the Archbishop of Mainz following the death of Aribo.