John X (archbishop of Ravenna)

[6] He was also related to Bishops John II of Lucca and Cunibert of Turin, and to the scholar Anselm of Besate.

[2] Not long after his election, John travelled to Aachen to jointly crown the young Otto III with Archbishop Willigis of Mainz on 25 December 983.

John X's participation in the coronation, as a representative of Italy, is unique in the history of the Holy Roman Empire.

[12] After Philagathos was elected antipope, Gregory nullified the elevation of Piacenza, returned it to the jurisdiction of Ravenna and declared it vacant on 7 July 997.

His death is not recorded, but the archdiocese was vacant shortly afterwards, since Otto III engineered the election of Gerbert of Aurillac, who was invested with the see on 28 April 998.