Venetian districts

The city of Venice is divided into six districts called sestrieri. Each sestriere has different progressive street numbers except for the biggest areas, which include separate islands.
The six sestrieri of Venice are: San Marco, taking his name from San Marco church, Castello, one of the first venetian areas to be inhabited, take its name from an ancient castle now disappeared, Cannaregio, from the morass where used to grow a grove of reeds, San Polo, the city centre and Santa Croce, the smallest district, Dorsoduro, from the thick sandy hills over which the district has raised and Giudecca, from the name of this separate island facing Zattere.