Adalbero of Würzburg was an 11th-century Benedictine monk who served as the Bishop of Würzburg. Born around 1010 to the Counts of Wels-Lambach, he was the nephew of Bishop Bruno. After studying in Würzburg and Paris, he succeeded his uncle as bishop in 1045. A significant figure in ecclesiastical reform, he supported the Cluniac movement and worked to renew various abbeys. His political life was defined by his loyalty to Pope Gregory VII during the Investiture controversy, a stance that eventually led to his exile and deposition.