城郭都市(自由都市) 平山城 自由都市 1161 After the fall of the Western Roman Empire, Portovenere became the base of the Byzantine fleet in the northern Tyrrhenian Sea, but was destroyed by the Lombards in 643 CE. Later, it was a frequent target of Saracen raids. First indications of the existence of a castle date from 1113, and in 1161 the walls were erected. Portovenere became a fiefdom of a family from Vezzano before passing to Genoa in the early twelfth century. In 1494, it suffered a devastating bombardment from the Aragonese fleet during their war with Genoa: subsequently the old part of the town declined in importance, giving way to the development of the Borgo Nuovo ("New District"), which had existed from 1139 and is centred on the church of St. Peter.
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