Capodimonte is a comune in the Province of Viterbo in the Italian region Lazio, located about 90 kilometres northwest of Rome and about 20 …Capodimonte is a comune in the Province of Viterbo in the Italian region Lazio, located about 90 kilometres northwest of Rome and about 20 kilometres northwest of Viterbo. It is on the southwestern shore of Lake Bolsena. In contrast to the other communities on the lake, Capodimonte has a headland with a sheltered harbor.