Maginulf; Sylvester IV
He was elected in opposition to Pope Paschal II by the imperialistic party who supported Henry IV's claim to the right of investiture.
The election took place during the Truce of God when the pope's followers were unarmed, but on the following day when Paschal advanced on the city Maginulf fled from Rome to the protection of the German nobles.
He wandered through Italy and Germany with the emperor's friends but finally submitted to the pope and was allowed to end his days under the protection of Werner, Duke of Spoleto.
New Catholic Dictionary