The first settlements
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".
Increasing trade followed the doge and found in the deep Grand Canal a safe and ship accessible canal-port. Drainage reveals that the city became more compact over time: at that time the Canal was wider and flowed between small, tide-subjected islands connected by wooden bridges.
Along the Canal the number of "fondaco" houses increased, buildings combining the warehouse and the merchant's residence.
A portico (the curia) covers the bank and facilitates the ships' unloading. From the portico a corridor flanked by storerooms reaches a posterior courtyard. Similarly, on the first floor a loggia as large as the portico illuminates the hall into which open the merchant's rooms. The façade is thereby divided into an airy central part and two more solid sides. A low mezzanine with offices divides the two floors.
The fondaco house often had two lateral defensive towers (torreselle), as in the Fondaco dei Turchi (13th century, heavily restored in the 19th). With the German warehouse, the Fondaco dei Tedeschi (which is also situated on the Grand Canal), it reflects the high number of foreign merchants working in Venice, where the republic supplied them with storerooms and lodging and simultaneously controlled their trading activity.
More public buildings were built along the Canal at Rialto: palaces for commercial and financial Benches (Palazzo dei Camerlenghi and Palazzo dei Dieci Savi, rebuilt after 1514 fire) and a mint. In 1181 Nicolò Barattieri constructed a pontoon bridge connecting Rialto to Mercerie area, which was later replaced by a wooden bridge with shops on it. Warehouses for flour and salt were more peripheral.
The Venetian-Byzantine style
From the Byzantine empire goods arrived together with sculptures, friezes, columns and capitals to decorate the fondaco houses of patrician families. The Byzantine art merged with previous elements resulting in a Venetian-Byzantine style; in architecture it was characterized by large loggias with round or elongated arches and by polychrome marbles abundance.
Along the Grand Canal these elements are well preserved in Ca' Farsetti, Ca' Loredan (both municipal seats) and Ca' da Mosto, all dating back to the 12th or 13th century. During this period Rialto had an intense building development, determining the conformation of the Canal and surrounding areas. As a matter of fact, in Venice building materials are precious and foundations are usually kept: in the subsequent restorations, existing elements will be used again, mixing the Venetian-Byzantine and the new styles (Ca' Sagredo, Palazzo Bembo). Polychromy, three-partitioned façades, loggias, diffuse openings and rooms disposition formed a particular architectural taste that continued in the future.
The Fourth Crusade, with the loot obtained from the sack of Constantinople (1204), and other historical situations, gave Venice an Eastern influence until the late 14th century.
Venetian Gothic architecture found favor quite late, as a splendid flamboyant Gothic ("gotico fiorito") beginning with the southern façade of the Doge's Palace. The verticality and the illumination characterizing the Gothic style are found in the porticos and loggias of fondaco houses: columns get thinner, elongated arches are replaced by pointed or ogee or lobed ones. Porticos rise gently intertwining and drawing open marbles in quatrefoils or similar figures. Façades were plastered in brilliant colors.
The open marble fascias, often referred as "laces", quickly diffused along the Grand Canal. Among the 15th century palaces still showing the original appearance are Ca' d'Oro, Palazzo Bernardo, Ca' Foscari (now housing the University of Venice), Palazzo Pisani Moretta, Palazzi Barbaro, Palazzo Cavalli-Franchetti.
Renaissance
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.
Classical architecture is more evident in Jacopo Sansovino's projects, who arrived from Rome in 1527. Along the Canal he designed Palazzo Corner and Palazzo Dolfin Manin, known for grandiosity, for the horizontal layout of the white façades and for the development around a central courtyard. Other Renaissance buildings are Palazzo Papadopoli and Palazzo Grimani di San Luca. Several palaces of this period had façades with frescoes by painters such as Il Pordenone, Tintoretto, Paolo Veronese, all of them unfortunately lost.
In 1582 Alessandro Vittoria began the construction of Palazzo Balbi (now housing the Government of Veneto), in which Baroque elements can be recognized: fashioned cornices, broken pediments, ornamental motifs.
The major Baroque architect in Venice was Baldassarre Longhena. In 1631 he began to build the magnificent Santa Maria della Salute basilica, one of the most beautiful churches in Venice and a symbol of Grand Canal . The classical layout of the façade features decorations and by many statues, the latter crowning also the refined volutes surrounding the major dome.
Longhena later designed two majestic palaces like Ca' Pesaro and Ca' Rezzonico (with many carvings and chiaroscuro effects) and Santa Maria di Nazareth church (Chiesa degli Scalzi). For various reasons the great architect did not see any of these buildings finished, and they were all modified after his death but the Salute.
Longhena's themes recur in the two older façades of Palazzo Labia, containing a famous fresco cycle by Giambattista Tiepolo. In the Longhenian school grew Domenico Rossi (San Stae's façade, Ca' Corner della Regina) and Giorgio Massari, who later completed Ca' Rezzonico.
The 16th and 17th centuries mark the beginning of the Republic's decline, but nevertheless they saw the highest building activity on the Grand Canal. This can be partially explained by the increasing number of families (like the Labia) becoming patrician by the payment of an enormous sum to the Republic, in financial difficulties. Once gained this status, these families provided themselves of adequate residences on the Canal, often inducing other families to renew theirs.
Neoclassical architecture
Neoclassical architectures along the Canal date to 18th century: during the first half was built San Simeone Piccolo, with an impressive corinthian portico, central plan and a high copper-covered dome ending in a cupola shaped as a temple. Date to the second half Massari's Palazzo Grassi.
