Thirteen steps from the Campo di San Canciano (a campo is a small square) and seven towards the Calle della Malvasia (a calle is a lane): the San Canciano bridge, in Cannaregio, crosses the rio dei Santi Apostoli (a small canal), resting its base in the ground floor of a palace, where two old iron hooks await the hands of passers-by — touching them brings good luck, tradition swears.