The Grand Canal is a canal in Venice, Italy. It forms one of the major water-traffic corridors in the city. Public transport is provided by water buses (Italian: vaporetti) and private water taxis, and many tourists explore the canal by gondola.
At one end, the canal leads into the lagoon near the Santa Lucia railway station and the other end leads into Saint Mark Basin; in between, it makes a large reverse-S shape through the central districts (sestieri) of Venice. It is 3,800 m long, 30¨C90 m wide, with an average depth of five meters (16.5 ft).
The banks of the Grand Canal are lined with more than 170 buildings, most of which date from the 13th to the 18th century, and demonstrate the welfare and art created by the Republic of Venice. The noble Venetian families faced huge expenses to show off their richness in suitable palazzos; this contest reveals the citizens' pride and the deep bond with the lagoon. Amongst the many are the Palazzi Barbaro, Ca' Rezzonico, Ca' d'Oro, Palazzo Dario, Ca' Foscari, Palazzo Barbarigo and to Palazzo Venier dei Leoni, housing the Peggy Guggenheim Collection.
Because most of the city's traffic goes along the Canal rather than across it, only one bridge crossed the canal until the 19th century, the Rialto Bridge. There are currently three more bridges, the Ponte degli Scalzi, the Ponte dell'Accademia, and the recent, controversial Ponte della Costituzione, designed by Santiago Calatrava, connecting the train station to Piazzale Roma, one of the few places in Venice where buses and cars can enter. As was usual in the past, people can still take a ferry ride across the canal at several points by standing up on the deck of a simple gondola called a traghetto, although this service is less common than even a decade ago.
The Grand Canal probably follows the course of an ancient river (possibly a branch of the Brenta) flowing into the lagoon. Adriatic Veneti groups already lived beside the formerly-named "Rio Businiacus" before the Roman age. They lived in stilt houses and on fishing and commerce (mainly salt). Under the rule of the Roman empire and later of the Byzantine empire the lagoon became populated and important, and in the early 9th century the doge moved his seat from Malamocco to the safer "Rivoaltus".
By the start of the 15th century, Renaissance architecture motifs appear in such buildings as the Palazzo Dario and the Palazzo Corner Spinelli; the latter was designed by Mauro Codussi, pioneer of this style in Venice. Ca' Vendramin Calergi, another of his projects (now hosting the Casino), reveals a completed transition: the numerous and large windows with open marbles are round-arched and have columns in the three classical orders.