From the Wikipedia page [1]
The Metropolitan City of Venice (Italian: Città Metropolitana di Venezia) is a metropolitan city in the Veneto region, Italy. Its capital is the city of Venice. It replaced the Province of Venice and includes the city of Venice and other 43 municipalities (comuni). It was first created by the reform of local authorities (Law 142/1990) and then established by the Law 56/2014. The Metropolitan City of Venice is headed by the Metropolitan Mayor (Sindaco metropolitano) and by the Metropolitan Council (Consiglio metropolitano).
The spatial spread of the Venice metropolitan area has greatly accelerated over recent decades. The Padua-Treviso-Venice Metropolitan Area (PATREVE) or Venice City-Region, in fact, is an urban agglomeration centred on the cities of Padua, Treviso and Venice in the Veneto region of north-east Italy. It is defined statistically and does not correspond to a single area of local government. Administratively it comprises the communes (municipalities) of the 3 cities plus other 240 communes (overall 104 in the province of Padua, 95 in the province of Treviso and 44 in the province of Venice).