Bridges over the Canal Grande are rare in Venice, and this is partly because of opposition from the gondolieri, for whom bridges detract from their income. The current Rialto Bridge dates from the 16th century, the Accademia from 1854, the Scalzi from 1934, if (like most Venetians) you ignore its Austrian predecessor, and Santiago Calatrava’s Ponte della Costituzione only opened in 2008. Unfortunately for some visitors, it has no ramps, only steps.