Magic Lantern slide circa 1900 hand coloured. Victorian/Edwardian era. The Rialto Bridge (Italian: Ponte di Rialto; Venetian: Ponte de Rialto) is the oldest of the four bridges spanning the Grand Canal in Venice, Italy. Connecting the sestieri (districts) of San Marco and San Polo, it has been rebuilt several times since its first construction as a pontoon bridge in the 12th century, and is now a significant tourist attraction in the city.