In 953, being still a minor, he succeeded his uncle Mastalo I, after 50 years of Patrician government. In 957 he came of age and was elected first Duke of Amalfi by the “Aristocrazia Comitale Amalfitana”. He rose to a high rank, the same than that of the Duke of Naples and of the Doge of Venice.
In 958, still very young, he was a victim of an attempt made on “Monte di Scala”. This attempt was organized by Sergio, the descendant of the Musco Comite family, who started a new ruling dynasty lasting 115 years.