Pope Formosus
In 894, she accompanied her 14-year-old son, Lambert, to Rome to be confirmed as emperor by Pope Formosus, who supported the Carolingian claimant Arnulf of Carinthia. In 896, she and her son were holed up in Spoleto when Arnulf marched into Rome and was crowned in opposition to Lambert. Arnulf was soon paralysed by a stroke and Formosus died. Ageltrude quickly interfered to assert her authority in Rome and have elected her candidate as Pope Stephen VI. At her and Lambert's request, the body of Formosus was disinterred and tried, convicted and hurled into the Tiber in the Cadaver Synod. Lambert became Lambert II of Spoleto.