Venice was built at 42 1, so why build Venice? What is the significance of building Venice?

At first, the city was sparsely populated in the early 5th century. However, because of its natural port position facing the Adriatic Sea, Venice has gradually become a world shipping center, and its population has also increased dramatically. Therefore, the Venetians, who had almost no land, built this huge water city.

Venice was founded in 42 1 year. The real mass migration to Lake was due to Lombardy's massive invasion in 568 AD. However, the administrative center of Venice was still on land. Around 740, the political center of Venice moved from Eracle to Malamocco in Lido. In August10, Charlemagne, which unified most of Western Europe, prepared to annex Venice, which still belonged to Byzantium. Pippin Carloman, Charlemagne's third son (also called Italian Pippin, be careful not to be a famous dwarf Pippin or Charlemagne's eldest son Pippin with a hunchback) personally led the Frankish fleet to attack Venice Lake from ravenna, but Pippin soon died in Milan, because Franks were not familiar with water and plague.