Venice's typographical palimpsests are pretty fascinating. You can find all sorts of examples of buildings that have been re-numbered where you can seetwo opposing numbers side by side: one old address beside a new. But this one's a curious relic: a quickly scrawled, chalked-up 341 elbowing its way in beside a perfectly serviceable permanent one. I'm not sure what the reason is behind this -- rogue chalk artist? Italian kid practicing penmanship? some sort of typographical Goofus and Gallant? -- but the sight has surely faded from view by now.