Venice is one of the most important Italian cities, for both its port activity and its touristic importance. Its name comes from the way the population of Veneto region were called. The venetian lagoon formed approximately in 800 b.C. ; the strong presence of resources that supported hunting and fishing made scientists think that human settlements were already there during prehistoric era. For a better exploration purpose, Piazza San Marco can be considered the very center of the city; it is the only real square of the city and one of the most beautiful squares in the world (other smaller squares are called Campi in Venice). Piazza San Marco hosts the homonymous cathedral, the Palazzo Ducale (seat of the Doge in the past) and the historical bell tower. Another highlight of the city is Ponte di Rialto (bridge of Rialto) lined with its characteristic old Italian style shops. Port of Venice departures and arrivals: Patrasso, Igoumenitsa, Porec, Rovigno, Pula, Piran, Umag and Rabac. The sailing companies operating from and to Venice are: Anek Superfast, Minoan Lines and Venezia Lines.