Venice, Genoa, and Mediterranean Trade Cities

Venice grew from communities of refugees who fled the mainland Veneto during the Lombard invasions of the late 6th century CE, settling on the marshy islands of a lagoon at the head of the Adriatic Sea that offered natural defense against land-based enemies while remaining accessible to seaborne trade. Nominally under Byzantine sovereignty in its early centuries, the lagoon settlement developed its own leadership under a doge (from Latin dux), with Orso Ipato, attested around 726, among the earliest historically documented holders of the title. The settlement centered increasingly on the Rialto islands from the 810s, after Doge Agnello Participazio moved the seat of government there following an unsuccessful Frankish attack on the lagoon led by Pepin, son of Charlemagne, in 810.