Guido IV
Duca di Spoleto
(>870–97)

Biographical

Duca di Spoleto c. 888–97†
Marchese di Camerino c. 888–97†
Prince of Benevento 895–97

Guido did not succeed his father but rather his great-uncle Emperor Guy, who relinquished Spoleto after becoming King of the Franks in 888. Guido, largely operating in the shadow of his more prominent relatives, emerged on the political stage only after the death of his great-uncle Guido in 895, aligning himself with his cousin, Emperor Lambert, and Lambert's mother Ageltruda in efforts to bring the Lombard provinces under the control of both the Empire and the Duchy of Spoleto, and successfully expelling the Byzantines from Benevento in August of that year. His interventions in the south, backed by dynastic connections and the traditional ambitions of the Spoleto house to extend their influence, alarmed Pope Formosus, who feared that the reunification of Spoleto with the southern Lombard territories under imperial authority might threaten the Papal States, prompting him to appeal to King Arnulf of Germany for support. Guido was present in Rome during the infamous 'synod of the corpse' that condemned Formosus after his death, potentially playing a role in its symbolic extremity as an expression of the Spoleto faction’s longstanding opposition to the pope. His increasing involvement in southern and Roman politics made him a formidable figure, yet in March 897 he was assassinated on a bridge over the Tiber by his vassal Alberico of Spoleto, who had familial ties to him and had been an ally of Emperor Guy. This murder, steeped in the intricate rivalries of the time, allowed Alberico to seize control of Spoleto and Camerino, while Benevento had been entrusted to Radelchi, Ageltruda's brother, in the emperor’s name prior to Guido’s death. Thus ended Guido’s ambitions and influence in Italy. His year of birth is estimated to be between 870 and 875, though sources are uncertain of his and his sister's parentage.

Place of death: near Rome

Son of Guido II.