The dynamic of the growth of tourism in Venice is faithfully parallel to that of the decrease in resident inhabitants. Data referring to arrivals and attendance in receiving structures show a constant growth since 1951: arrivals grew from 476.000 to 1.472.000, and attendance from 1.229.000 to 3.288.000. The same happens to excursionistic tourism, which in terms of arrivals represents 70% of flows. Besides having a structural role in the city’s economy, tourism also has an increasing role in the “occupation” of spaces: each day visitors are more than 50% of the total presences in the city.