Diego was the third bishop of the restored diocese of Ourense

Diocese of Ourense

Diocese of Ourense Is one of the five districts in which the Roman Catholic church divides Galicia in North-western Spain...

 from between 1097 and 1100 until his death. He was a canon

Canon (priest)

A canon is a priest or minister who is a member of certain bodies of the Christian clergy subject to an ecclesiastical rule ....

 of the Cathedral of Santiago de Compostela

Cathedral of Santiago de Compostela

Santiago de Compostela Cathedral is a Roman Catholic cathedral of the archdiocese of Santiago de Compostela in Galicia, Spain. The cathedral is the reputed burial-place of Saint James the Greater, one of the apostles of Jesus Christ. It is the destination of the Way of St...

 and a protégé of its bishop, Diego Gelmírez

Diego Gelmírez

Diego Gelmírez was the second bishop and first archbishop of the Roman Catholic Archdiocese of Santiago de Compostela in Galicia, Spain. He is a prominent figure in the history of Galicia and an important historiographer of the Spain of his day...

, with whom he remained in close association even after his promotion to his own see. In 1118–19, according to the Historia Compostellana, he served Gelmírez as an ambassador to the Papal curia. Like his patron, he also supported Queen Urraca during her war against her husband, Alfonso the Battler

Alfonso the Battler

Alfonso I , called the Battler or the Warrior , was the king of Aragon and Navarre from 1104 until his death in 1134. He was the second son of King Sancho Ramírez and successor of his brother Peter I...

.