A name that is a gentle lie: in the Campo dei Due Pozzi, ’the square of the two wells’, at the far end of Castello towards San Martino, there is now only one well. But it is not a mistake: until the 16th century there really were two vere da pozzo (wellheads) here — the sources remember them as ’twin wells’ and in de’ Barbari’s map of 1500 they can be clearly seen, one beside the other.